2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
33 #include "opt_inet6.h"
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/malloc.h>
41 #include <sys/endian.h>
43 #include <sys/socket.h>
46 #include <net/ethernet.h>
48 #include <net/if_var.h>
49 #include <net/if_llc.h>
50 #include <net/if_media.h>
51 #include <net/if_vlan_var.h>
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_regdomain.h>
55 #ifdef IEEE80211_SUPPORT_SUPERG
56 #include <net80211/ieee80211_superg.h>
58 #ifdef IEEE80211_SUPPORT_TDMA
59 #include <net80211/ieee80211_tdma.h>
61 #include <net80211/ieee80211_wds.h>
62 #include <net80211/ieee80211_mesh.h>
63 #include <net80211/ieee80211_vht.h>
65 #if defined(INET) || defined(INET6)
66 #include <netinet/in.h>
70 #include <netinet/if_ether.h>
71 #include <netinet/in_systm.h>
72 #include <netinet/ip.h>
75 #include <netinet/ip6.h>
78 #include <security/mac/mac_framework.h>
80 #define ETHER_HEADER_COPY(dst, src) \
81 memcpy(dst, src, sizeof(struct ether_header))
83 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *,
84 u_int hdrsize, u_int ciphdrsize, u_int mtu);
85 static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int);
87 #ifdef IEEE80211_DEBUG
89 * Decide if an outbound management frame should be
90 * printed when debugging is enabled. This filters some
91 * of the less interesting frames that come frequently
95 doprint(struct ieee80211vap *vap, int subtype)
98 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
99 return (vap->iv_opmode == IEEE80211_M_IBSS);
106 * Transmit a frame to the given destination on the given VAP.
108 * It's up to the caller to figure out the details of who this
109 * is going to and resolving the node.
111 * This routine takes care of queuing it for power save,
112 * A-MPDU state stuff, fast-frames state stuff, encapsulation
113 * if required, then passing it up to the driver layer.
115 * This routine (for now) consumes the mbuf and frees the node
116 * reference; it ideally will return a TX status which reflects
117 * whether the mbuf was consumed or not, so the caller can
118 * free the mbuf (if appropriate) and the node reference (again,
122 ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m,
123 struct ieee80211_node *ni)
125 struct ieee80211com *ic = vap->iv_ic;
126 struct ifnet *ifp = vap->iv_ifp;
129 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
130 (m->m_flags & M_PWR_SAV) == 0) {
132 * Station in power save mode; pass the frame
133 * to the 802.11 layer and continue. We'll get
134 * the frame back when the time is right.
135 * XXX lose WDS vap linkage?
137 if (ieee80211_pwrsave(ni, m) != 0)
138 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
139 ieee80211_free_node(ni);
142 * We queued it fine, so tell the upper layer
143 * that we consumed it.
147 /* calculate priority so drivers can find the tx queue */
148 if (ieee80211_classify(ni, m)) {
149 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
150 ni->ni_macaddr, NULL,
151 "%s", "classification failure");
152 vap->iv_stats.is_tx_classify++;
153 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
155 ieee80211_free_node(ni);
157 /* XXX better status? */
161 * Stash the node pointer. Note that we do this after
162 * any call to ieee80211_dwds_mcast because that code
163 * uses any existing value for rcvif to identify the
164 * interface it (might have been) received on.
166 m->m_pkthdr.rcvif = (void *)ni;
167 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1: 0;
169 BPF_MTAP(ifp, m); /* 802.3 tx */
172 * Check if A-MPDU tx aggregation is setup or if we
173 * should try to enable it. The sta must be associated
174 * with HT and A-MPDU enabled for use. When the policy
175 * routine decides we should enable A-MPDU we issue an
176 * ADDBA request and wait for a reply. The frame being
177 * encapsulated will go out w/o using A-MPDU, or possibly
178 * it might be collected by the driver and held/retransmit.
179 * The default ic_ampdu_enable routine handles staggering
180 * ADDBA requests in case the receiver NAK's us or we are
181 * otherwise unable to establish a BA stream.
183 * Don't treat group-addressed frames as candidates for aggregation;
184 * net80211 doesn't support 802.11aa-2012 and so group addressed
185 * frames will always have sequence numbers allocated from the NON_QOS
188 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) &&
189 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX)) {
190 if ((m->m_flags & M_EAPOL) == 0 && (! mcast)) {
191 int tid = WME_AC_TO_TID(M_WME_GETAC(m));
192 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid];
194 ieee80211_txampdu_count_packet(tap);
195 if (IEEE80211_AMPDU_RUNNING(tap)) {
197 * Operational, mark frame for aggregation.
199 * XXX do tx aggregation here
201 m->m_flags |= M_AMPDU_MPDU;
202 } else if (!IEEE80211_AMPDU_REQUESTED(tap) &&
203 ic->ic_ampdu_enable(ni, tap)) {
205 * Not negotiated yet, request service.
207 ieee80211_ampdu_request(ni, tap);
208 /* XXX hold frame for reply? */
213 #ifdef IEEE80211_SUPPORT_SUPERG
215 * Check for AMSDU/FF; queue for aggregation
217 * Note: we don't bother trying to do fast frames or
218 * A-MSDU encapsulation for 802.3 drivers. Now, we
219 * likely could do it for FF (because it's a magic
220 * atheros tunnel LLC type) but I don't think we're going
221 * to really need to. For A-MSDU we'd have to set the
222 * A-MSDU QoS bit in the wifi header, so we just plain
225 * Strictly speaking, we could actually /do/ A-MSDU / FF
226 * with A-MPDU together which for certain circumstances
227 * is beneficial (eg A-MSDU of TCK ACKs.) However,
228 * I'll ignore that for now so existing behaviour is maintained.
229 * Later on it would be good to make "amsdu + ampdu" configurable.
231 else if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
232 if ((! mcast) && ieee80211_amsdu_tx_ok(ni)) {
233 m = ieee80211_amsdu_check(ni, m);
235 /* NB: any ni ref held on stageq */
236 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
237 "%s: amsdu_check queued frame\n",
241 } else if ((! mcast) && IEEE80211_ATH_CAP(vap, ni,
242 IEEE80211_NODE_FF)) {
243 m = ieee80211_ff_check(ni, m);
245 /* NB: any ni ref held on stageq */
246 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
247 "%s: ff_check queued frame\n",
253 #endif /* IEEE80211_SUPPORT_SUPERG */
256 * Grab the TX lock - serialise the TX process from this
257 * point (where TX state is being checked/modified)
258 * through to driver queue.
260 IEEE80211_TX_LOCK(ic);
263 * XXX make the encap and transmit code a separate function
264 * so things like the FF (and later A-MSDU) path can just call
265 * it for flushed frames.
267 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
269 * Encapsulate the packet in prep for transmission.
271 m = ieee80211_encap(vap, ni, m);
273 /* NB: stat+msg handled in ieee80211_encap */
274 IEEE80211_TX_UNLOCK(ic);
275 ieee80211_free_node(ni);
276 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
280 (void) ieee80211_parent_xmitpkt(ic, m);
283 * Unlock at this point - no need to hold it across
284 * ieee80211_free_node() (ie, the comlock)
286 IEEE80211_TX_UNLOCK(ic);
287 ic->ic_lastdata = ticks;
295 * Send the given mbuf through the given vap.
297 * This consumes the mbuf regardless of whether the transmit
298 * was successful or not.
300 * This does none of the initial checks that ieee80211_start()
301 * does (eg CAC timeout, interface wakeup) - the caller must
305 ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m)
307 #define IS_DWDS(vap) \
308 (vap->iv_opmode == IEEE80211_M_WDS && \
309 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0)
310 struct ieee80211com *ic = vap->iv_ic;
311 struct ifnet *ifp = vap->iv_ifp;
312 struct ieee80211_node *ni;
313 struct ether_header *eh;
316 * Cancel any background scan.
318 if (ic->ic_flags & IEEE80211_F_SCAN)
319 ieee80211_cancel_anyscan(vap);
321 * Find the node for the destination so we can do
322 * things like power save and fast frames aggregation.
324 * NB: past this point various code assumes the first
325 * mbuf has the 802.3 header present (and contiguous).
328 if (m->m_len < sizeof(struct ether_header) &&
329 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) {
330 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
331 "discard frame, %s\n", "m_pullup failed");
332 vap->iv_stats.is_tx_nobuf++; /* XXX */
333 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
336 eh = mtod(m, struct ether_header *);
337 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
340 * Only unicast frames from the above go out
341 * DWDS vaps; multicast frames are handled by
342 * dispatching the frame as it comes through
343 * the AP vap (see below).
345 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS,
346 eh->ether_dhost, "mcast", "%s", "on DWDS");
347 vap->iv_stats.is_dwds_mcast++;
349 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
350 /* XXX better status? */
353 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
355 * Spam DWDS vap's w/ multicast traffic.
357 /* XXX only if dwds in use? */
358 ieee80211_dwds_mcast(vap, m);
361 #ifdef IEEE80211_SUPPORT_MESH
362 if (vap->iv_opmode != IEEE80211_M_MBSS) {
364 ni = ieee80211_find_txnode(vap, eh->ether_dhost);
366 /* NB: ieee80211_find_txnode does stat+msg */
367 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
369 /* XXX better status? */
372 if (ni->ni_associd == 0 &&
373 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) {
374 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
375 eh->ether_dhost, NULL,
376 "sta not associated (type 0x%04x)",
377 htons(eh->ether_type));
378 vap->iv_stats.is_tx_notassoc++;
379 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
381 ieee80211_free_node(ni);
382 /* XXX better status? */
385 #ifdef IEEE80211_SUPPORT_MESH
387 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) {
389 * Proxy station only if configured.
391 if (!ieee80211_mesh_isproxyena(vap)) {
392 IEEE80211_DISCARD_MAC(vap,
393 IEEE80211_MSG_OUTPUT |
395 eh->ether_dhost, NULL,
396 "%s", "proxy not enabled");
397 vap->iv_stats.is_mesh_notproxy++;
398 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
400 /* XXX better status? */
403 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
404 "forward frame from DS SA(%6D), DA(%6D)\n",
405 eh->ether_shost, ":",
406 eh->ether_dhost, ":");
407 ieee80211_mesh_proxy_check(vap, eh->ether_shost);
409 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m);
412 * NB: ieee80211_mesh_discover holds/disposes
413 * frame (e.g. queueing on path discovery).
415 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
416 /* XXX better status? */
423 * We've resolved the sender, so attempt to transmit it.
426 if (vap->iv_state == IEEE80211_S_SLEEP) {
428 * In power save; queue frame and then wakeup device
431 ic->ic_lastdata = ticks;
432 if (ieee80211_pwrsave(ni, m) != 0)
433 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
434 ieee80211_free_node(ni);
435 ieee80211_new_state(vap, IEEE80211_S_RUN, 0);
439 if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0)
446 * Start method for vap's. All packets from the stack come
447 * through here. We handle common processing of the packets
448 * before dispatching them to the underlying device.
450 * if_transmit() requires that the mbuf be consumed by this call
451 * regardless of the return condition.
454 ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m)
456 struct ieee80211vap *vap = ifp->if_softc;
457 struct ieee80211com *ic = vap->iv_ic;
460 * No data frames go out unless we're running.
461 * Note in particular this covers CAC and CSA
462 * states (though maybe we should check muting
465 if (vap->iv_state != IEEE80211_S_RUN &&
466 vap->iv_state != IEEE80211_S_SLEEP) {
468 /* re-check under the com lock to avoid races */
469 if (vap->iv_state != IEEE80211_S_RUN &&
470 vap->iv_state != IEEE80211_S_SLEEP) {
471 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
472 "%s: ignore queue, in %s state\n",
473 __func__, ieee80211_state_name[vap->iv_state]);
474 vap->iv_stats.is_tx_badstate++;
475 IEEE80211_UNLOCK(ic);
476 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
478 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
481 IEEE80211_UNLOCK(ic);
485 * Sanitize mbuf flags for net80211 use. We cannot
486 * clear M_PWR_SAV or M_MORE_DATA because these may
487 * be set for frames that are re-submitted from the
490 * NB: This must be done before ieee80211_classify as
491 * it marks EAPOL in frames with M_EAPOL.
493 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA);
496 * Bump to the packet transmission path.
497 * The mbuf will be consumed here.
499 return (ieee80211_start_pkt(vap, m));
503 ieee80211_vap_qflush(struct ifnet *ifp)
510 * 802.11 raw output routine.
512 * XXX TODO: this (and other send routines) should correctly
513 * XXX keep the pwr mgmt bit set if it decides to call into the
514 * XXX driver to send a frame whilst the state is SLEEP.
516 * Otherwise the peer may decide that we're awake and flood us
517 * with traffic we are still too asleep to receive!
520 ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni,
521 struct mbuf *m, const struct ieee80211_bpf_params *params)
523 struct ieee80211com *ic = vap->iv_ic;
527 * Set node - the caller has taken a reference, so ensure
528 * that the mbuf has the same node value that
529 * it would if it were going via the normal path.
531 m->m_pkthdr.rcvif = (void *)ni;
534 * Attempt to add bpf transmit parameters.
536 * For now it's ok to fail; the raw_xmit api still takes
539 * Later on when ic_raw_xmit() has params removed,
540 * they'll have to be added - so fail the transmit if
544 (void) ieee80211_add_xmit_params(m, params);
546 error = ic->ic_raw_xmit(ni, m, params);
548 if_inc_counter(vap->iv_ifp, IFCOUNTER_OERRORS, 1);
549 ieee80211_free_node(ni);
555 * 802.11 output routine. This is (currently) used only to
556 * connect bpf write calls to the 802.11 layer for injecting
560 ieee80211_output(struct ifnet *ifp, struct mbuf *m,
561 const struct sockaddr *dst, struct route *ro)
563 #define senderr(e) do { error = (e); goto bad;} while (0)
564 struct ieee80211_node *ni = NULL;
565 struct ieee80211vap *vap;
566 struct ieee80211_frame *wh;
567 struct ieee80211com *ic = NULL;
571 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) {
573 * Short-circuit requests if the vap is marked OACTIVE
574 * as this can happen because a packet came down through
575 * ieee80211_start before the vap entered RUN state in
576 * which case it's ok to just drop the frame. This
577 * should not be necessary but callers of if_output don't
585 * Hand to the 802.3 code if not tagged as
586 * a raw 802.11 frame.
588 if (dst->sa_family != AF_IEEE80211)
589 return vap->iv_output(ifp, m, dst, ro);
591 error = mac_ifnet_check_transmit(ifp, m);
595 if (ifp->if_flags & IFF_MONITOR)
597 if (!IFNET_IS_UP_RUNNING(ifp))
599 if (vap->iv_state == IEEE80211_S_CAC) {
600 IEEE80211_DPRINTF(vap,
601 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
602 "block %s frame in CAC state\n", "raw data");
603 vap->iv_stats.is_tx_badstate++;
604 senderr(EIO); /* XXX */
605 } else if (vap->iv_state == IEEE80211_S_SCAN)
607 /* XXX bypass bridge, pfil, carp, etc. */
609 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack))
610 senderr(EIO); /* XXX */
611 wh = mtod(m, struct ieee80211_frame *);
612 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
613 IEEE80211_FC0_VERSION_0)
614 senderr(EIO); /* XXX */
615 if (m->m_pkthdr.len < ieee80211_anyhdrsize(wh))
616 senderr(EIO); /* XXX */
618 /* locate destination node */
619 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
620 case IEEE80211_FC1_DIR_NODS:
621 case IEEE80211_FC1_DIR_FROMDS:
622 ni = ieee80211_find_txnode(vap, wh->i_addr1);
624 case IEEE80211_FC1_DIR_TODS:
625 case IEEE80211_FC1_DIR_DSTODS:
626 ni = ieee80211_find_txnode(vap, wh->i_addr3);
629 senderr(EIO); /* XXX */
633 * Permit packets w/ bpf params through regardless
634 * (see below about sa_len).
636 if (dst->sa_len == 0)
637 senderr(EHOSTUNREACH);
638 ni = ieee80211_ref_node(vap->iv_bss);
642 * Sanitize mbuf for net80211 flags leaked from above.
644 * NB: This must be done before ieee80211_classify as
645 * it marks EAPOL in frames with M_EAPOL.
647 m->m_flags &= ~M_80211_TX;
649 /* calculate priority so drivers can find the tx queue */
650 /* XXX assumes an 802.3 frame */
651 if (ieee80211_classify(ni, m))
652 senderr(EIO); /* XXX */
654 IEEE80211_NODE_STAT(ni, tx_data);
655 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
656 IEEE80211_NODE_STAT(ni, tx_mcast);
657 m->m_flags |= M_MCAST;
659 IEEE80211_NODE_STAT(ni, tx_ucast);
660 /* NB: ieee80211_encap does not include 802.11 header */
661 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len);
663 IEEE80211_TX_LOCK(ic);
666 * NB: DLT_IEEE802_11_RADIO identifies the parameters are
667 * present by setting the sa_len field of the sockaddr (yes,
669 * NB: we assume sa_data is suitably aligned to cast.
671 ret = ieee80211_raw_output(vap, ni, m,
672 (const struct ieee80211_bpf_params *)(dst->sa_len ?
673 dst->sa_data : NULL));
674 IEEE80211_TX_UNLOCK(ic);
680 ieee80211_free_node(ni);
681 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
687 * Set the direction field and address fields of an outgoing
688 * frame. Note this should be called early on in constructing
689 * a frame as it sets i_fc[1]; other bits can then be or'd in.
692 ieee80211_send_setup(
693 struct ieee80211_node *ni,
696 const uint8_t sa[IEEE80211_ADDR_LEN],
697 const uint8_t da[IEEE80211_ADDR_LEN],
698 const uint8_t bssid[IEEE80211_ADDR_LEN])
700 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh)
701 struct ieee80211vap *vap = ni->ni_vap;
702 struct ieee80211_tx_ampdu *tap;
703 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
706 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic);
708 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type;
709 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) {
710 switch (vap->iv_opmode) {
711 case IEEE80211_M_STA:
712 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
713 IEEE80211_ADDR_COPY(wh->i_addr1, bssid);
714 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
715 IEEE80211_ADDR_COPY(wh->i_addr3, da);
717 case IEEE80211_M_IBSS:
718 case IEEE80211_M_AHDEMO:
719 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
720 IEEE80211_ADDR_COPY(wh->i_addr1, da);
721 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
722 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
724 case IEEE80211_M_HOSTAP:
725 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
726 IEEE80211_ADDR_COPY(wh->i_addr1, da);
727 IEEE80211_ADDR_COPY(wh->i_addr2, bssid);
728 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
730 case IEEE80211_M_WDS:
731 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
732 IEEE80211_ADDR_COPY(wh->i_addr1, da);
733 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
734 IEEE80211_ADDR_COPY(wh->i_addr3, da);
735 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
737 case IEEE80211_M_MBSS:
738 #ifdef IEEE80211_SUPPORT_MESH
739 if (IEEE80211_IS_MULTICAST(da)) {
740 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
742 IEEE80211_ADDR_COPY(wh->i_addr1, da);
743 IEEE80211_ADDR_COPY(wh->i_addr2,
746 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
747 IEEE80211_ADDR_COPY(wh->i_addr1, da);
748 IEEE80211_ADDR_COPY(wh->i_addr2,
750 IEEE80211_ADDR_COPY(wh->i_addr3, da);
751 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
755 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */
759 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
760 IEEE80211_ADDR_COPY(wh->i_addr1, da);
761 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
762 #ifdef IEEE80211_SUPPORT_MESH
763 if (vap->iv_opmode == IEEE80211_M_MBSS)
764 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
767 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
769 *(uint16_t *)&wh->i_dur[0] = 0;
772 * XXX TODO: this is what the TX lock is for.
773 * Here we're incrementing sequence numbers, and they
774 * need to be in lock-step with what the driver is doing
775 * both in TX ordering and crypto encap (IV increment.)
777 * If the driver does seqno itself, then we can skip
778 * assigning sequence numbers here, and we can avoid
779 * requiring the TX lock.
781 tap = &ni->ni_tx_ampdu[tid];
782 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) {
783 m->m_flags |= M_AMPDU_MPDU;
785 /* NB: zero out i_seq field (for s/w encryption etc) */
786 *(uint16_t *)&wh->i_seq[0] = 0;
788 if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK,
789 type & IEEE80211_FC0_SUBTYPE_MASK))
791 * 802.11-2012 9.3.2.10 - QoS multicast frames
792 * come out of a different seqno space.
794 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
795 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
797 seqno = ni->ni_txseqs[tid]++;
802 *(uint16_t *)&wh->i_seq[0] =
803 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
804 M_SEQNO_SET(m, seqno);
807 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
808 m->m_flags |= M_MCAST;
813 * Send a management frame to the specified node. The node pointer
814 * must have a reference as the pointer will be passed to the driver
815 * and potentially held for a long time. If the frame is successfully
816 * dispatched to the driver, then it is responsible for freeing the
817 * reference (and potentially free'ing up any associated storage);
818 * otherwise deal with reclaiming any reference (on error).
821 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type,
822 struct ieee80211_bpf_params *params)
824 struct ieee80211vap *vap = ni->ni_vap;
825 struct ieee80211com *ic = ni->ni_ic;
826 struct ieee80211_frame *wh;
829 KASSERT(ni != NULL, ("null node"));
831 if (vap->iv_state == IEEE80211_S_CAC) {
832 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
833 ni, "block %s frame in CAC state",
834 ieee80211_mgt_subtype_name(type));
835 vap->iv_stats.is_tx_badstate++;
836 ieee80211_free_node(ni);
838 return EIO; /* XXX */
841 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
843 ieee80211_free_node(ni);
847 IEEE80211_TX_LOCK(ic);
849 wh = mtod(m, struct ieee80211_frame *);
850 ieee80211_send_setup(ni, m,
851 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID,
852 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
853 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) {
854 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1,
855 "encrypting frame (%s)", __func__);
856 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
858 m->m_flags |= M_ENCAP; /* mark encapsulated */
860 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?"));
861 M_WME_SETAC(m, params->ibp_pri);
863 #ifdef IEEE80211_DEBUG
864 /* avoid printing too many frames */
865 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) ||
866 ieee80211_msg_dumppkts(vap)) {
867 printf("[%s] send %s on channel %u\n",
868 ether_sprintf(wh->i_addr1),
869 ieee80211_mgt_subtype_name(type),
870 ieee80211_chan2ieee(ic, ic->ic_curchan));
873 IEEE80211_NODE_STAT(ni, tx_mgmt);
875 ret = ieee80211_raw_output(vap, ni, m, params);
876 IEEE80211_TX_UNLOCK(ic);
881 ieee80211_nulldata_transmitted(struct ieee80211_node *ni, void *arg,
884 struct ieee80211vap *vap = ni->ni_vap;
890 * Send a null data frame to the specified node. If the station
891 * is setup for QoS then a QoS Null Data frame is constructed.
892 * If this is a WDS station then a 4-address frame is constructed.
894 * NB: the caller is assumed to have setup a node reference
895 * for use; this is necessary to deal with a race condition
896 * when probing for inactive stations. Like ieee80211_mgmt_output
897 * we must cleanup any node reference on error; however we
898 * can safely just unref it as we know it will never be the
899 * last reference to the node.
902 ieee80211_send_nulldata(struct ieee80211_node *ni)
904 struct ieee80211vap *vap = ni->ni_vap;
905 struct ieee80211com *ic = ni->ni_ic;
907 struct ieee80211_frame *wh;
912 if (vap->iv_state == IEEE80211_S_CAC) {
913 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
914 ni, "block %s frame in CAC state", "null data");
915 ieee80211_unref_node(&ni);
916 vap->iv_stats.is_tx_badstate++;
917 return EIO; /* XXX */
920 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))
921 hdrlen = sizeof(struct ieee80211_qosframe);
923 hdrlen = sizeof(struct ieee80211_frame);
924 /* NB: only WDS vap's get 4-address frames */
925 if (vap->iv_opmode == IEEE80211_M_WDS)
926 hdrlen += IEEE80211_ADDR_LEN;
927 if (ic->ic_flags & IEEE80211_F_DATAPAD)
928 hdrlen = roundup(hdrlen, sizeof(uint32_t));
930 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0);
933 ieee80211_unref_node(&ni);
934 vap->iv_stats.is_tx_nobuf++;
937 KASSERT(M_LEADINGSPACE(m) >= hdrlen,
938 ("leading space %zd", M_LEADINGSPACE(m)));
939 M_PREPEND(m, hdrlen, M_NOWAIT);
941 /* NB: cannot happen */
942 ieee80211_free_node(ni);
946 IEEE80211_TX_LOCK(ic);
948 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */
949 if (ni->ni_flags & IEEE80211_NODE_QOS) {
950 const int tid = WME_AC_TO_TID(WME_AC_BE);
953 ieee80211_send_setup(ni, m,
954 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL,
955 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
957 if (vap->iv_opmode == IEEE80211_M_WDS)
958 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
960 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
961 qos[0] = tid & IEEE80211_QOS_TID;
962 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy)
963 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
966 ieee80211_send_setup(ni, m,
967 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA,
968 IEEE80211_NONQOS_TID,
969 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
971 if (vap->iv_opmode != IEEE80211_M_WDS) {
972 /* NB: power management bit is never sent by an AP */
973 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
974 vap->iv_opmode != IEEE80211_M_HOSTAP)
975 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT;
977 if ((ic->ic_flags & IEEE80211_F_SCAN) &&
978 (ni->ni_flags & IEEE80211_NODE_PWR_MGT)) {
979 ieee80211_add_callback(m, ieee80211_nulldata_transmitted,
982 m->m_len = m->m_pkthdr.len = hdrlen;
983 m->m_flags |= M_ENCAP; /* mark encapsulated */
985 M_WME_SETAC(m, WME_AC_BE);
987 IEEE80211_NODE_STAT(ni, tx_data);
989 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni,
990 "send %snull data frame on channel %u, pwr mgt %s",
991 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "",
992 ieee80211_chan2ieee(ic, ic->ic_curchan),
993 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis");
995 ret = ieee80211_raw_output(vap, ni, m, NULL);
996 IEEE80211_TX_UNLOCK(ic);
1001 * Assign priority to a frame based on any vlan tag assigned
1002 * to the station and/or any Diffserv setting in an IP header.
1003 * Finally, if an ACM policy is setup (in station mode) it's
1007 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m)
1009 const struct ether_header *eh = mtod(m, struct ether_header *);
1010 int v_wme_ac, d_wme_ac, ac;
1013 * Always promote PAE/EAPOL frames to high priority.
1015 if (eh->ether_type == htons(ETHERTYPE_PAE)) {
1016 /* NB: mark so others don't need to check header */
1017 m->m_flags |= M_EAPOL;
1022 * Non-qos traffic goes to BE.
1024 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) {
1030 * If node has a vlan tag then all traffic
1031 * to it must have a matching tag.
1034 if (ni->ni_vlan != 0) {
1035 if ((m->m_flags & M_VLANTAG) == 0) {
1036 IEEE80211_NODE_STAT(ni, tx_novlantag);
1039 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) !=
1040 EVL_VLANOFTAG(ni->ni_vlan)) {
1041 IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
1044 /* map vlan priority to AC */
1045 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan));
1048 /* XXX m_copydata may be too slow for fast path */
1050 if (eh->ether_type == htons(ETHERTYPE_IP)) {
1053 * IP frame, map the DSCP bits from the TOS field.
1055 /* NB: ip header may not be in first mbuf */
1056 m_copydata(m, sizeof(struct ether_header) +
1057 offsetof(struct ip, ip_tos), sizeof(tos), &tos);
1058 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
1059 d_wme_ac = TID_TO_WME_AC(tos);
1063 if (eh->ether_type == htons(ETHERTYPE_IPV6)) {
1067 * IPv6 frame, map the DSCP bits from the traffic class field.
1069 m_copydata(m, sizeof(struct ether_header) +
1070 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow),
1072 tos = (uint8_t)(ntohl(flow) >> 20);
1073 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
1074 d_wme_ac = TID_TO_WME_AC(tos);
1077 d_wme_ac = WME_AC_BE;
1085 * Use highest priority AC.
1087 if (v_wme_ac > d_wme_ac)
1095 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) {
1096 static const int acmap[4] = {
1097 WME_AC_BK, /* WME_AC_BE */
1098 WME_AC_BK, /* WME_AC_BK */
1099 WME_AC_BE, /* WME_AC_VI */
1100 WME_AC_VI, /* WME_AC_VO */
1102 struct ieee80211com *ic = ni->ni_ic;
1104 while (ac != WME_AC_BK &&
1105 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm)
1114 * Insure there is sufficient contiguous space to encapsulate the
1115 * 802.11 data frame. If room isn't already there, arrange for it.
1116 * Drivers and cipher modules assume we have done the necessary work
1117 * and fail rudely if they don't find the space they need.
1120 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize,
1121 struct ieee80211_key *key, struct mbuf *m)
1123 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
1124 int needed_space = vap->iv_ic->ic_headroom + hdrsize;
1127 /* XXX belongs in crypto code? */
1128 needed_space += key->wk_cipher->ic_header;
1131 * When crypto is being done in the host we must insure
1132 * the data are writable for the cipher routines; clone
1133 * a writable mbuf chain.
1134 * XXX handle SWMIC specially
1136 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) {
1137 m = m_unshare(m, M_NOWAIT);
1139 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
1140 "%s: cannot get writable mbuf\n", __func__);
1141 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */
1147 * We know we are called just before stripping an Ethernet
1148 * header and prepending an LLC header. This means we know
1150 * sizeof(struct ether_header) - sizeof(struct llc)
1151 * bytes recovered to which we need additional space for the
1152 * 802.11 header and any crypto header.
1154 /* XXX check trailing space and copy instead? */
1155 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
1156 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type);
1158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
1159 "%s: cannot expand storage\n", __func__);
1160 vap->iv_stats.is_tx_nobuf++;
1164 KASSERT(needed_space <= MHLEN,
1165 ("not enough room, need %u got %d\n", needed_space, MHLEN));
1167 * Setup new mbuf to have leading space to prepend the
1168 * 802.11 header and any crypto header bits that are
1169 * required (the latter are added when the driver calls
1170 * back to ieee80211_crypto_encap to do crypto encapsulation).
1172 /* NB: must be first 'cuz it clobbers m_data */
1173 m_move_pkthdr(n, m);
1174 n->m_len = 0; /* NB: m_gethdr does not set */
1175 n->m_data += needed_space;
1177 * Pull up Ethernet header to create the expected layout.
1178 * We could use m_pullup but that's overkill (i.e. we don't
1179 * need the actual data) and it cannot fail so do it inline
1182 /* NB: struct ether_header is known to be contiguous */
1183 n->m_len += sizeof(struct ether_header);
1184 m->m_len -= sizeof(struct ether_header);
1185 m->m_data += sizeof(struct ether_header);
1187 * Replace the head of the chain.
1193 #undef TO_BE_RECLAIMED
1197 * Return the transmit key to use in sending a unicast frame.
1198 * If a unicast key is set we use that. When no unicast key is set
1199 * we fall back to the default transmit key.
1201 static __inline struct ieee80211_key *
1202 ieee80211_crypto_getucastkey(struct ieee80211vap *vap,
1203 struct ieee80211_node *ni)
1205 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) {
1206 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
1207 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
1209 return &vap->iv_nw_keys[vap->iv_def_txkey];
1211 return &ni->ni_ucastkey;
1216 * Return the transmit key to use in sending a multicast frame.
1217 * Multicast traffic always uses the group key which is installed as
1218 * the default tx key.
1220 static __inline struct ieee80211_key *
1221 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap,
1222 struct ieee80211_node *ni)
1224 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
1225 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
1227 return &vap->iv_nw_keys[vap->iv_def_txkey];
1231 * Encapsulate an outbound data frame. The mbuf chain is updated.
1232 * If an error is encountered NULL is returned. The caller is required
1233 * to provide a node reference and pullup the ethernet header in the
1236 * NB: Packet is assumed to be processed by ieee80211_classify which
1237 * marked EAPOL frames w/ M_EAPOL.
1240 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni,
1243 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh))
1244 #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc)
1245 struct ieee80211com *ic = ni->ni_ic;
1246 #ifdef IEEE80211_SUPPORT_MESH
1247 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1248 struct ieee80211_meshcntl_ae10 *mc;
1249 struct ieee80211_mesh_route *rt = NULL;
1252 struct ether_header eh;
1253 struct ieee80211_frame *wh;
1254 struct ieee80211_key *key;
1256 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr, is_mcast;
1257 ieee80211_seq seqno;
1258 int meshhdrsize, meshae;
1262 IEEE80211_TX_LOCK_ASSERT(ic);
1264 is_mcast = !! (m->m_flags & (M_MCAST | M_BCAST));
1267 * Copy existing Ethernet header to a safe place. The
1268 * rest of the code assumes it's ok to strip it when
1269 * reorganizing state for the final encapsulation.
1271 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
1272 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t));
1275 * Insure space for additional headers. First identify
1276 * transmit key to use in calculating any buffer adjustments
1277 * required. This is also used below to do privacy
1278 * encapsulation work. Then calculate the 802.11 header
1279 * size and any padding required by the driver.
1281 * Note key may be NULL if we fall back to the default
1282 * transmit key and that is not set. In that case the
1283 * buffer may not be expanded as needed by the cipher
1284 * routines, but they will/should discard it.
1286 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
1287 if (vap->iv_opmode == IEEE80211_M_STA ||
1288 !IEEE80211_IS_MULTICAST(eh.ether_dhost) ||
1289 (vap->iv_opmode == IEEE80211_M_WDS &&
1290 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)))
1291 key = ieee80211_crypto_getucastkey(vap, ni);
1293 key = ieee80211_crypto_getmcastkey(vap, ni);
1294 if (key == NULL && (m->m_flags & M_EAPOL) == 0) {
1295 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO,
1297 "no default transmit key (%s) deftxkey %u",
1298 __func__, vap->iv_def_txkey);
1299 vap->iv_stats.is_tx_nodefkey++;
1305 * XXX Some ap's don't handle QoS-encapsulated EAPOL
1306 * frames so suppress use. This may be an issue if other
1307 * ap's require all data frames to be QoS-encapsulated
1308 * once negotiated in which case we'll need to make this
1311 * Don't send multicast QoS frames.
1312 * Technically multicast frames can be QoS if all stations in the
1315 * NB: mesh data frames are QoS, including multicast frames.
1318 (((is_mcast == 0) && (ni->ni_flags &
1319 (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))) ||
1320 (vap->iv_opmode == IEEE80211_M_MBSS)) &&
1321 (m->m_flags & M_EAPOL) == 0;
1324 hdrsize = sizeof(struct ieee80211_qosframe);
1326 hdrsize = sizeof(struct ieee80211_frame);
1327 #ifdef IEEE80211_SUPPORT_MESH
1328 if (vap->iv_opmode == IEEE80211_M_MBSS) {
1330 * Mesh data frames are encapsulated according to the
1331 * rules of Section 11B.8.5 (p.139 of D3.0 spec).
1332 * o Group Addressed data (aka multicast) originating
1333 * at the local sta are sent w/ 3-address format and
1334 * address extension mode 00
1335 * o Individually Addressed data (aka unicast) originating
1336 * at the local sta are sent w/ 4-address format and
1337 * address extension mode 00
1338 * o Group Addressed data forwarded from a non-mesh sta are
1339 * sent w/ 3-address format and address extension mode 01
1340 * o Individually Address data from another sta are sent
1341 * w/ 4-address format and address extension mode 10
1343 is4addr = 0; /* NB: don't use, disable */
1344 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) {
1345 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost);
1346 KASSERT(rt != NULL, ("route is NULL"));
1347 dir = IEEE80211_FC1_DIR_DSTODS;
1348 hdrsize += IEEE80211_ADDR_LEN;
1349 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1350 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate,
1352 IEEE80211_NOTE_MAC(vap,
1355 "%s", "trying to send to ourself");
1358 meshae = IEEE80211_MESH_AE_10;
1360 sizeof(struct ieee80211_meshcntl_ae10);
1362 meshae = IEEE80211_MESH_AE_00;
1364 sizeof(struct ieee80211_meshcntl);
1367 dir = IEEE80211_FC1_DIR_FROMDS;
1368 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) {
1370 meshae = IEEE80211_MESH_AE_01;
1372 sizeof(struct ieee80211_meshcntl_ae01);
1375 meshae = IEEE80211_MESH_AE_00;
1376 meshhdrsize = sizeof(struct ieee80211_meshcntl);
1382 * 4-address frames need to be generated for:
1383 * o packets sent through a WDS vap (IEEE80211_M_WDS)
1384 * o packets sent through a vap marked for relaying
1385 * (e.g. a station operating with dynamic WDS)
1387 is4addr = vap->iv_opmode == IEEE80211_M_WDS ||
1388 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) &&
1389 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr));
1391 hdrsize += IEEE80211_ADDR_LEN;
1392 meshhdrsize = meshae = 0;
1393 #ifdef IEEE80211_SUPPORT_MESH
1397 * Honor driver DATAPAD requirement.
1399 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1400 hdrspace = roundup(hdrsize, sizeof(uint32_t));
1404 if (__predict_true((m->m_flags & M_FF) == 0)) {
1408 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m);
1410 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
1413 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */
1414 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
1415 llc = mtod(m, struct llc *);
1416 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
1417 llc->llc_control = LLC_UI;
1418 llc->llc_snap.org_code[0] = 0;
1419 llc->llc_snap.org_code[1] = 0;
1420 llc->llc_snap.org_code[2] = 0;
1421 llc->llc_snap.ether_type = eh.ether_type;
1423 #ifdef IEEE80211_SUPPORT_SUPERG
1425 * Aggregated frame. Check if it's for AMSDU or FF.
1427 * XXX TODO: IEEE80211_NODE_AMSDU* isn't implemented
1428 * anywhere for some reason. But, since 11n requires
1429 * AMSDU RX, we can just assume "11n" == "AMSDU".
1431 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: called; M_FF\n", __func__);
1432 if (ieee80211_amsdu_tx_ok(ni)) {
1433 m = ieee80211_amsdu_encap(vap, m, hdrspace + meshhdrsize, key);
1436 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key);
1442 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
1444 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT);
1446 vap->iv_stats.is_tx_nobuf++;
1449 wh = mtod(m, struct ieee80211_frame *);
1450 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
1451 *(uint16_t *)wh->i_dur = 0;
1452 qos = NULL; /* NB: quiet compiler */
1454 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1455 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1456 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1457 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1458 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost);
1459 } else switch (vap->iv_opmode) {
1460 case IEEE80211_M_STA:
1461 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
1462 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid);
1463 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1464 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1466 case IEEE80211_M_IBSS:
1467 case IEEE80211_M_AHDEMO:
1468 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
1469 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1470 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1472 * NB: always use the bssid from iv_bss as the
1473 * neighbor's may be stale after an ibss merge
1475 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid);
1477 case IEEE80211_M_HOSTAP:
1478 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1479 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1480 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
1481 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
1483 #ifdef IEEE80211_SUPPORT_MESH
1484 case IEEE80211_M_MBSS:
1485 /* NB: offset by hdrspace to deal with DATAPAD */
1486 mc = (struct ieee80211_meshcntl_ae10 *)
1487 (mtod(m, uint8_t *) + hdrspace);
1490 case IEEE80211_MESH_AE_00: /* no proxy */
1492 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */
1493 IEEE80211_ADDR_COPY(wh->i_addr1,
1495 IEEE80211_ADDR_COPY(wh->i_addr2,
1497 IEEE80211_ADDR_COPY(wh->i_addr3,
1499 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4,
1501 qos =((struct ieee80211_qosframe_addr4 *)
1503 } else if (dir == IEEE80211_FC1_DIR_FROMDS) {
1505 IEEE80211_ADDR_COPY(wh->i_addr1,
1507 IEEE80211_ADDR_COPY(wh->i_addr2,
1509 IEEE80211_ADDR_COPY(wh->i_addr3,
1511 qos = ((struct ieee80211_qosframe *)
1515 case IEEE80211_MESH_AE_01: /* mcast, proxy */
1516 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1517 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1518 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1519 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr);
1521 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4,
1523 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1525 case IEEE80211_MESH_AE_10: /* ucast, proxy */
1526 KASSERT(rt != NULL, ("route is NULL"));
1527 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop);
1528 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1529 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate);
1530 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr);
1531 mc->mc_flags = IEEE80211_MESH_AE_10;
1532 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost);
1533 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost);
1534 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1537 KASSERT(0, ("meshae %d", meshae));
1540 mc->mc_ttl = ms->ms_ttl;
1542 le32enc(mc->mc_seq, ms->ms_seq);
1545 case IEEE80211_M_WDS: /* NB: is4addr should always be true */
1549 if (m->m_flags & M_MORE_DATA)
1550 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
1555 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1556 /* NB: mesh case handled earlier */
1557 } else if (vap->iv_opmode != IEEE80211_M_MBSS)
1558 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1559 ac = M_WME_GETAC(m);
1560 /* map from access class/queue to 11e header priorty value */
1561 tid = WME_AC_TO_TID(ac);
1562 qos[0] = tid & IEEE80211_QOS_TID;
1563 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy)
1564 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
1565 #ifdef IEEE80211_SUPPORT_MESH
1566 if (vap->iv_opmode == IEEE80211_M_MBSS)
1567 qos[1] = IEEE80211_QOS_MC;
1571 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS;
1574 * If this is an A-MSDU then ensure we set the
1578 qos[0] |= IEEE80211_QOS_AMSDU;
1581 * XXX TODO TX lock is needed for atomic updates of sequence
1582 * numbers. If the driver does it, then don't do it here;
1583 * and we don't need the TX lock held.
1585 if ((m->m_flags & M_AMPDU_MPDU) == 0) {
1587 * 802.11-2012 9.3.2.10 -
1589 * If this is a multicast frame then we need
1590 * to ensure that the sequence number comes from
1591 * a separate seqno space and not the TID space.
1593 * Otherwise multicast frames may actually cause
1594 * holes in the TX blockack window space and
1595 * upset various things.
1597 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1598 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
1600 seqno = ni->ni_txseqs[tid]++;
1603 * NB: don't assign a sequence # to potential
1604 * aggregates; we expect this happens at the
1605 * point the frame comes off any aggregation q
1606 * as otherwise we may introduce holes in the
1607 * BA sequence space and/or make window accouting
1610 * XXX may want to control this with a driver
1611 * capability; this may also change when we pull
1612 * aggregation up into net80211
1614 seqno = ni->ni_txseqs[tid]++;
1615 *(uint16_t *)wh->i_seq =
1616 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1617 M_SEQNO_SET(m, seqno);
1619 /* NB: zero out i_seq field (for s/w encryption etc) */
1620 *(uint16_t *)wh->i_seq = 0;
1624 * XXX TODO TX lock is needed for atomic updates of sequence
1625 * numbers. If the driver does it, then don't do it here;
1626 * and we don't need the TX lock held.
1628 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
1629 *(uint16_t *)wh->i_seq =
1630 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1631 M_SEQNO_SET(m, seqno);
1634 * XXX TODO: we shouldn't allow EAPOL, etc that would
1635 * be forced to be non-QoS traffic to be A-MSDU encapsulated.
1638 printf("%s: XXX ERROR: is_amsdu set; not QoS!\n",
1643 * Check if xmit fragmentation is required.
1645 * If the hardware does fragmentation offload, then don't bother
1648 if (IEEE80211_CONF_FRAG_OFFLOAD(ic))
1651 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold &&
1652 !IEEE80211_IS_MULTICAST(wh->i_addr1) &&
1653 (vap->iv_caps & IEEE80211_C_TXFRAG) &&
1654 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0);
1658 * IEEE 802.1X: send EAPOL frames always in the clear.
1659 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set.
1661 if ((m->m_flags & M_EAPOL) == 0 ||
1662 ((vap->iv_flags & IEEE80211_F_WPA) &&
1663 (vap->iv_opmode == IEEE80211_M_STA ?
1664 !IEEE80211_KEY_UNDEFINED(key) :
1665 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) {
1666 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
1667 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) {
1668 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT,
1670 "%s", "enmic failed, discard frame");
1671 vap->iv_stats.is_crypto_enmicfail++;
1676 if (txfrag && !ieee80211_fragment(vap, m, hdrsize,
1677 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold))
1680 m->m_flags |= M_ENCAP; /* mark encapsulated */
1682 IEEE80211_NODE_STAT(ni, tx_data);
1683 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1684 IEEE80211_NODE_STAT(ni, tx_mcast);
1685 m->m_flags |= M_MCAST;
1687 IEEE80211_NODE_STAT(ni, tx_ucast);
1688 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
1700 ieee80211_free_mbuf(struct mbuf *m)
1708 next = m->m_nextpkt;
1709 m->m_nextpkt = NULL;
1711 } while ((m = next) != NULL);
1715 * Fragment the frame according to the specified mtu.
1716 * The size of the 802.11 header (w/o padding) is provided
1717 * so we don't need to recalculate it. We create a new
1718 * mbuf for each fragment and chain it through m_nextpkt;
1719 * we might be able to optimize this by reusing the original
1720 * packet's mbufs but that is significantly more complicated.
1723 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0,
1724 u_int hdrsize, u_int ciphdrsize, u_int mtu)
1726 struct ieee80211com *ic = vap->iv_ic;
1727 struct ieee80211_frame *wh, *whf;
1728 struct mbuf *m, *prev;
1729 u_int totalhdrsize, fragno, fragsize, off, remainder, payload;
1732 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?"));
1733 KASSERT(m0->m_pkthdr.len > mtu,
1734 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu));
1737 * Honor driver DATAPAD requirement.
1739 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1740 hdrspace = roundup(hdrsize, sizeof(uint32_t));
1744 wh = mtod(m0, struct ieee80211_frame *);
1745 /* NB: mark the first frag; it will be propagated below */
1746 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG;
1747 totalhdrsize = hdrspace + ciphdrsize;
1749 off = mtu - ciphdrsize;
1750 remainder = m0->m_pkthdr.len - off;
1753 fragsize = MIN(totalhdrsize + remainder, mtu);
1754 m = m_get2(fragsize, M_NOWAIT, MT_DATA, M_PKTHDR);
1757 /* leave room to prepend any cipher header */
1758 m_align(m, fragsize - ciphdrsize);
1761 * Form the header in the fragment. Note that since
1762 * we mark the first fragment with the MORE_FRAG bit
1763 * it automatically is propagated to each fragment; we
1764 * need only clear it on the last fragment (done below).
1765 * NB: frag 1+ dont have Mesh Control field present.
1767 whf = mtod(m, struct ieee80211_frame *);
1768 memcpy(whf, wh, hdrsize);
1769 #ifdef IEEE80211_SUPPORT_MESH
1770 if (vap->iv_opmode == IEEE80211_M_MBSS) {
1771 if (IEEE80211_IS_DSTODS(wh))
1772 ((struct ieee80211_qosframe_addr4 *)
1773 whf)->i_qos[1] &= ~IEEE80211_QOS_MC;
1775 ((struct ieee80211_qosframe *)
1776 whf)->i_qos[1] &= ~IEEE80211_QOS_MC;
1779 *(uint16_t *)&whf->i_seq[0] |= htole16(
1780 (fragno & IEEE80211_SEQ_FRAG_MASK) <<
1781 IEEE80211_SEQ_FRAG_SHIFT);
1784 payload = fragsize - totalhdrsize;
1785 /* NB: destination is known to be contiguous */
1787 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace);
1788 m->m_len = hdrspace + payload;
1789 m->m_pkthdr.len = hdrspace + payload;
1790 m->m_flags |= M_FRAG;
1792 /* chain up the fragment */
1793 prev->m_nextpkt = m;
1796 /* deduct fragment just formed */
1797 remainder -= payload;
1799 } while (remainder != 0);
1801 /* set the last fragment */
1802 m->m_flags |= M_LASTFRAG;
1803 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG;
1805 /* strip first mbuf now that everything has been copied */
1806 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize)));
1807 m0->m_flags |= M_FIRSTFRAG | M_FRAG;
1809 vap->iv_stats.is_tx_fragframes++;
1810 vap->iv_stats.is_tx_frags += fragno-1;
1814 /* reclaim fragments but leave original frame for caller to free */
1815 ieee80211_free_mbuf(m0->m_nextpkt);
1816 m0->m_nextpkt = NULL;
1821 * Add a supported rates element id to a frame.
1824 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs)
1828 *frm++ = IEEE80211_ELEMID_RATES;
1829 nrates = rs->rs_nrates;
1830 if (nrates > IEEE80211_RATE_SIZE)
1831 nrates = IEEE80211_RATE_SIZE;
1833 memcpy(frm, rs->rs_rates, nrates);
1834 return frm + nrates;
1838 * Add an extended supported rates element id to a frame.
1841 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs)
1844 * Add an extended supported rates element if operating in 11g mode.
1846 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
1847 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
1848 *frm++ = IEEE80211_ELEMID_XRATES;
1850 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
1857 * Add an ssid element to a frame.
1860 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len)
1862 *frm++ = IEEE80211_ELEMID_SSID;
1864 memcpy(frm, ssid, len);
1869 * Add an erp element to a frame.
1872 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic)
1876 *frm++ = IEEE80211_ELEMID_ERP;
1879 if (ic->ic_nonerpsta != 0)
1880 erp |= IEEE80211_ERP_NON_ERP_PRESENT;
1881 if (ic->ic_flags & IEEE80211_F_USEPROT)
1882 erp |= IEEE80211_ERP_USE_PROTECTION;
1883 if (ic->ic_flags & IEEE80211_F_USEBARKER)
1884 erp |= IEEE80211_ERP_LONG_PREAMBLE;
1890 * Add a CFParams element to a frame.
1893 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic)
1895 #define ADDSHORT(frm, v) do { \
1899 *frm++ = IEEE80211_ELEMID_CFPARMS;
1901 *frm++ = 0; /* CFP count */
1902 *frm++ = 2; /* CFP period */
1903 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */
1904 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */
1909 static __inline uint8_t *
1910 add_appie(uint8_t *frm, const struct ieee80211_appie *ie)
1912 memcpy(frm, ie->ie_data, ie->ie_len);
1913 return frm + ie->ie_len;
1916 static __inline uint8_t *
1917 add_ie(uint8_t *frm, const uint8_t *ie)
1919 memcpy(frm, ie, 2 + ie[1]);
1920 return frm + 2 + ie[1];
1923 #define WME_OUI_BYTES 0x00, 0x50, 0xf2
1925 * Add a WME information element to a frame.
1928 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme)
1930 static const struct ieee80211_wme_info info = {
1931 .wme_id = IEEE80211_ELEMID_VENDOR,
1932 .wme_len = sizeof(struct ieee80211_wme_info) - 2,
1933 .wme_oui = { WME_OUI_BYTES },
1934 .wme_type = WME_OUI_TYPE,
1935 .wme_subtype = WME_INFO_OUI_SUBTYPE,
1936 .wme_version = WME_VERSION,
1939 memcpy(frm, &info, sizeof(info));
1940 return frm + sizeof(info);
1944 * Add a WME parameters element to a frame.
1947 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme)
1949 #define SM(_v, _f) (((_v) << _f##_S) & _f)
1950 #define ADDSHORT(frm, v) do { \
1954 /* NB: this works 'cuz a param has an info at the front */
1955 static const struct ieee80211_wme_info param = {
1956 .wme_id = IEEE80211_ELEMID_VENDOR,
1957 .wme_len = sizeof(struct ieee80211_wme_param) - 2,
1958 .wme_oui = { WME_OUI_BYTES },
1959 .wme_type = WME_OUI_TYPE,
1960 .wme_subtype = WME_PARAM_OUI_SUBTYPE,
1961 .wme_version = WME_VERSION,
1965 memcpy(frm, ¶m, sizeof(param));
1966 frm += __offsetof(struct ieee80211_wme_info, wme_info);
1967 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */
1968 *frm++ = 0; /* reserved field */
1969 for (i = 0; i < WME_NUM_AC; i++) {
1970 const struct wmeParams *ac =
1971 &wme->wme_bssChanParams.cap_wmeParams[i];
1972 *frm++ = SM(i, WME_PARAM_ACI)
1973 | SM(ac->wmep_acm, WME_PARAM_ACM)
1974 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN)
1976 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX)
1977 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN)
1979 ADDSHORT(frm, ac->wmep_txopLimit);
1985 #undef WME_OUI_BYTES
1988 * Add an 11h Power Constraint element to a frame.
1991 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap)
1993 const struct ieee80211_channel *c = vap->iv_bss->ni_chan;
1994 /* XXX per-vap tx power limit? */
1995 int8_t limit = vap->iv_ic->ic_txpowlimit / 2;
1997 frm[0] = IEEE80211_ELEMID_PWRCNSTR;
1999 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0;
2004 * Add an 11h Power Capability element to a frame.
2007 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c)
2009 frm[0] = IEEE80211_ELEMID_PWRCAP;
2011 frm[2] = c->ic_minpower;
2012 frm[3] = c->ic_maxpower;
2017 * Add an 11h Supported Channels element to a frame.
2020 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic)
2022 static const int ielen = 26;
2024 frm[0] = IEEE80211_ELEMID_SUPPCHAN;
2026 /* XXX not correct */
2027 memcpy(frm+2, ic->ic_chan_avail, ielen);
2028 return frm + 2 + ielen;
2032 * Add an 11h Quiet time element to a frame.
2035 ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap, int update)
2037 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm;
2039 quiet->quiet_ie = IEEE80211_ELEMID_QUIET;
2043 * Only update every beacon interval - otherwise probe responses
2044 * would update the quiet count value.
2047 if (vap->iv_quiet_count_value == 1)
2048 vap->iv_quiet_count_value = vap->iv_quiet_count;
2049 else if (vap->iv_quiet_count_value > 1)
2050 vap->iv_quiet_count_value--;
2053 if (vap->iv_quiet_count_value == 0) {
2054 /* value 0 is reserved as per 802.11h standerd */
2055 vap->iv_quiet_count_value = 1;
2058 quiet->tbttcount = vap->iv_quiet_count_value;
2059 quiet->period = vap->iv_quiet_period;
2060 quiet->duration = htole16(vap->iv_quiet_duration);
2061 quiet->offset = htole16(vap->iv_quiet_offset);
2062 return frm + sizeof(*quiet);
2066 * Add an 11h Channel Switch Announcement element to a frame.
2067 * Note that we use the per-vap CSA count to adjust the global
2068 * counter so we can use this routine to form probe response
2069 * frames and get the current count.
2072 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap)
2074 struct ieee80211com *ic = vap->iv_ic;
2075 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm;
2077 csa->csa_ie = IEEE80211_ELEMID_CSA;
2079 csa->csa_mode = 1; /* XXX force quiet on channel */
2080 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan);
2081 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count;
2082 return frm + sizeof(*csa);
2086 * Add an 11h country information element to a frame.
2089 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic)
2092 if (ic->ic_countryie == NULL ||
2093 ic->ic_countryie_chan != ic->ic_bsschan) {
2095 * Handle lazy construction of ie. This is done on
2096 * first use and after a channel change that requires
2099 if (ic->ic_countryie != NULL)
2100 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE);
2101 ic->ic_countryie = ieee80211_alloc_countryie(ic);
2102 if (ic->ic_countryie == NULL)
2104 ic->ic_countryie_chan = ic->ic_bsschan;
2106 return add_appie(frm, ic->ic_countryie);
2110 ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap)
2112 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL)
2113 return (add_ie(frm, vap->iv_wpa_ie));
2115 /* XXX else complain? */
2121 ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap)
2123 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL)
2124 return (add_ie(frm, vap->iv_rsn_ie));
2126 /* XXX else complain? */
2132 ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni)
2134 if (ni->ni_flags & IEEE80211_NODE_QOS) {
2135 *frm++ = IEEE80211_ELEMID_QOS;
2144 * Send a probe request frame with the specified ssid
2145 * and any optional information element data.
2148 ieee80211_send_probereq(struct ieee80211_node *ni,
2149 const uint8_t sa[IEEE80211_ADDR_LEN],
2150 const uint8_t da[IEEE80211_ADDR_LEN],
2151 const uint8_t bssid[IEEE80211_ADDR_LEN],
2152 const uint8_t *ssid, size_t ssidlen)
2154 struct ieee80211vap *vap = ni->ni_vap;
2155 struct ieee80211com *ic = ni->ni_ic;
2156 struct ieee80211_node *bss;
2157 const struct ieee80211_txparam *tp;
2158 struct ieee80211_bpf_params params;
2159 const struct ieee80211_rateset *rs;
2164 bss = ieee80211_ref_node(vap->iv_bss);
2166 if (vap->iv_state == IEEE80211_S_CAC) {
2167 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2168 "block %s frame in CAC state", "probe request");
2169 vap->iv_stats.is_tx_badstate++;
2170 ieee80211_free_node(bss);
2171 return EIO; /* XXX */
2175 * Hold a reference on the node so it doesn't go away until after
2176 * the xmit is complete all the way in the driver. On error we
2177 * will remove our reference.
2179 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2180 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
2182 ni, ether_sprintf(ni->ni_macaddr),
2183 ieee80211_node_refcnt(ni)+1);
2184 ieee80211_ref_node(ni);
2187 * prreq frame format
2189 * [tlv] supported rates
2190 * [tlv] RSN (optional)
2191 * [tlv] extended supported rates
2192 * [tlv] HT cap (optional)
2193 * [tlv] VHT cap (optional)
2194 * [tlv] WPA (optional)
2195 * [tlv] user-specified ie's
2197 m = ieee80211_getmgtframe(&frm,
2198 ic->ic_headroom + sizeof(struct ieee80211_frame),
2199 2 + IEEE80211_NWID_LEN
2200 + 2 + IEEE80211_RATE_SIZE
2201 + sizeof(struct ieee80211_ie_htcap)
2202 + sizeof(struct ieee80211_ie_vhtcap)
2203 + sizeof(struct ieee80211_ie_htinfo) /* XXX not needed? */
2204 + sizeof(struct ieee80211_ie_wpa)
2205 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2206 + sizeof(struct ieee80211_ie_wpa)
2207 + (vap->iv_appie_probereq != NULL ?
2208 vap->iv_appie_probereq->ie_len : 0)
2211 vap->iv_stats.is_tx_nobuf++;
2212 ieee80211_free_node(ni);
2213 ieee80211_free_node(bss);
2217 frm = ieee80211_add_ssid(frm, ssid, ssidlen);
2218 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2219 frm = ieee80211_add_rates(frm, rs);
2220 frm = ieee80211_add_rsn(frm, vap);
2221 frm = ieee80211_add_xrates(frm, rs);
2224 * Note: we can't use bss; we don't have one yet.
2226 * So, we should announce our capabilities
2227 * in this channel mode (2g/5g), not the
2228 * channel details itself.
2230 if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
2231 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
2232 struct ieee80211_channel *c;
2235 * Get the HT channel that we should try upgrading to.
2236 * If we can do 40MHz then this'll upgrade it appropriately.
2238 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
2240 frm = ieee80211_add_htcap_ch(frm, vap, c);
2244 * XXX TODO: need to figure out what/how to update the
2248 (vap->iv_flags_vht & IEEE80211_FVHT_VHT) {
2249 struct ieee80211_channel *c;
2251 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
2253 c = ieee80211_vht_adjust_channel(ic, c, vap->iv_flags_vht);
2254 frm = ieee80211_add_vhtcap_ch(frm, vap, c);
2258 frm = ieee80211_add_wpa(frm, vap);
2259 if (vap->iv_appie_probereq != NULL)
2260 frm = add_appie(frm, vap->iv_appie_probereq);
2261 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2263 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame),
2264 ("leading space %zd", M_LEADINGSPACE(m)));
2265 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2267 /* NB: cannot happen */
2268 ieee80211_free_node(ni);
2269 ieee80211_free_node(bss);
2273 IEEE80211_TX_LOCK(ic);
2274 ieee80211_send_setup(ni, m,
2275 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ,
2276 IEEE80211_NONQOS_TID, sa, da, bssid);
2277 /* XXX power management? */
2278 m->m_flags |= M_ENCAP; /* mark encapsulated */
2280 M_WME_SETAC(m, WME_AC_BE);
2282 IEEE80211_NODE_STAT(ni, tx_probereq);
2283 IEEE80211_NODE_STAT(ni, tx_mgmt);
2285 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
2286 "send probe req on channel %u bssid %s sa %6D da %6D ssid \"%.*s\"\n",
2287 ieee80211_chan2ieee(ic, ic->ic_curchan),
2288 ether_sprintf(bssid),
2293 memset(¶ms, 0, sizeof(params));
2294 params.ibp_pri = M_WME_GETAC(m);
2295 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
2296 params.ibp_rate0 = tp->mgmtrate;
2297 if (IEEE80211_IS_MULTICAST(da)) {
2298 params.ibp_flags |= IEEE80211_BPF_NOACK;
2299 params.ibp_try0 = 1;
2301 params.ibp_try0 = tp->maxretry;
2302 params.ibp_power = ni->ni_txpower;
2303 ret = ieee80211_raw_output(vap, ni, m, ¶ms);
2304 IEEE80211_TX_UNLOCK(ic);
2305 ieee80211_free_node(bss);
2310 * Calculate capability information for mgt frames.
2313 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan)
2315 struct ieee80211com *ic = vap->iv_ic;
2318 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode"));
2320 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2321 capinfo = IEEE80211_CAPINFO_ESS;
2322 else if (vap->iv_opmode == IEEE80211_M_IBSS)
2323 capinfo = IEEE80211_CAPINFO_IBSS;
2326 if (vap->iv_flags & IEEE80211_F_PRIVACY)
2327 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2328 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2329 IEEE80211_IS_CHAN_2GHZ(chan))
2330 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2331 if (ic->ic_flags & IEEE80211_F_SHSLOT)
2332 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2333 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH))
2334 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
2339 * Send a management frame. The node is for the destination (or ic_bss
2340 * when in station mode). Nodes other than ic_bss have their reference
2341 * count bumped to reflect our use for an indeterminant time.
2344 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
2346 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT)
2347 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2348 struct ieee80211vap *vap = ni->ni_vap;
2349 struct ieee80211com *ic = ni->ni_ic;
2350 struct ieee80211_node *bss = vap->iv_bss;
2351 struct ieee80211_bpf_params params;
2355 int has_challenge, is_shared_key, ret, status;
2357 KASSERT(ni != NULL, ("null node"));
2360 * Hold a reference on the node so it doesn't go away until after
2361 * the xmit is complete all the way in the driver. On error we
2362 * will remove our reference.
2364 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2365 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
2367 ni, ether_sprintf(ni->ni_macaddr),
2368 ieee80211_node_refcnt(ni)+1);
2369 ieee80211_ref_node(ni);
2371 memset(¶ms, 0, sizeof(params));
2374 case IEEE80211_FC0_SUBTYPE_AUTH:
2377 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE ||
2378 arg == IEEE80211_AUTH_SHARED_RESPONSE) &&
2379 ni->ni_challenge != NULL);
2382 * Deduce whether we're doing open authentication or
2383 * shared key authentication. We do the latter if
2384 * we're in the middle of a shared key authentication
2385 * handshake or if we're initiating an authentication
2386 * request and configured to use shared key.
2388 is_shared_key = has_challenge ||
2389 arg >= IEEE80211_AUTH_SHARED_RESPONSE ||
2390 (arg == IEEE80211_AUTH_SHARED_REQUEST &&
2391 bss->ni_authmode == IEEE80211_AUTH_SHARED);
2393 m = ieee80211_getmgtframe(&frm,
2394 ic->ic_headroom + sizeof(struct ieee80211_frame),
2395 3 * sizeof(uint16_t)
2396 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ?
2397 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0)
2400 senderr(ENOMEM, is_tx_nobuf);
2402 ((uint16_t *)frm)[0] =
2403 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
2404 : htole16(IEEE80211_AUTH_ALG_OPEN);
2405 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */
2406 ((uint16_t *)frm)[2] = htole16(status);/* status */
2408 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) {
2409 ((uint16_t *)frm)[3] =
2410 htole16((IEEE80211_CHALLENGE_LEN << 8) |
2411 IEEE80211_ELEMID_CHALLENGE);
2412 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge,
2413 IEEE80211_CHALLENGE_LEN);
2414 m->m_pkthdr.len = m->m_len =
2415 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN;
2416 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) {
2417 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2418 "request encrypt frame (%s)", __func__);
2419 /* mark frame for encryption */
2420 params.ibp_flags |= IEEE80211_BPF_CRYPTO;
2423 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t);
2425 /* XXX not right for shared key */
2426 if (status == IEEE80211_STATUS_SUCCESS)
2427 IEEE80211_NODE_STAT(ni, tx_auth);
2429 IEEE80211_NODE_STAT(ni, tx_auth_fail);
2431 if (vap->iv_opmode == IEEE80211_M_STA)
2432 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
2433 (void *) vap->iv_state);
2436 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2437 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2438 "send station deauthenticate (reason: %d (%s))", arg,
2439 ieee80211_reason_to_string(arg));
2440 m = ieee80211_getmgtframe(&frm,
2441 ic->ic_headroom + sizeof(struct ieee80211_frame),
2444 senderr(ENOMEM, is_tx_nobuf);
2445 *(uint16_t *)frm = htole16(arg); /* reason */
2446 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
2448 IEEE80211_NODE_STAT(ni, tx_deauth);
2449 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg);
2451 ieee80211_node_unauthorize(ni); /* port closed */
2454 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2455 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2457 * asreq frame format
2458 * [2] capability information
2459 * [2] listen interval
2460 * [6*] current AP address (reassoc only)
2462 * [tlv] supported rates
2463 * [tlv] extended supported rates
2464 * [4] power capability (optional)
2465 * [28] supported channels (optional)
2466 * [tlv] HT capabilities
2467 * [tlv] VHT capabilities
2468 * [tlv] WME (optional)
2469 * [tlv] Vendor OUI HT capabilities (optional)
2470 * [tlv] Atheros capabilities (if negotiated)
2471 * [tlv] AppIE's (optional)
2473 m = ieee80211_getmgtframe(&frm,
2474 ic->ic_headroom + sizeof(struct ieee80211_frame),
2477 + IEEE80211_ADDR_LEN
2478 + 2 + IEEE80211_NWID_LEN
2479 + 2 + IEEE80211_RATE_SIZE
2480 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2483 + sizeof(struct ieee80211_wme_info)
2484 + sizeof(struct ieee80211_ie_htcap)
2485 + sizeof(struct ieee80211_ie_vhtcap)
2486 + 4 + sizeof(struct ieee80211_ie_htcap)
2487 #ifdef IEEE80211_SUPPORT_SUPERG
2488 + sizeof(struct ieee80211_ath_ie)
2490 + (vap->iv_appie_wpa != NULL ?
2491 vap->iv_appie_wpa->ie_len : 0)
2492 + (vap->iv_appie_assocreq != NULL ?
2493 vap->iv_appie_assocreq->ie_len : 0)
2496 senderr(ENOMEM, is_tx_nobuf);
2498 KASSERT(vap->iv_opmode == IEEE80211_M_STA,
2499 ("wrong mode %u", vap->iv_opmode));
2500 capinfo = IEEE80211_CAPINFO_ESS;
2501 if (vap->iv_flags & IEEE80211_F_PRIVACY)
2502 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2504 * NB: Some 11a AP's reject the request when
2505 * short preamble is set.
2507 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2508 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2509 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2510 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
2511 (ic->ic_caps & IEEE80211_C_SHSLOT))
2512 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2513 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) &&
2514 (vap->iv_flags & IEEE80211_F_DOTH))
2515 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
2516 *(uint16_t *)frm = htole16(capinfo);
2519 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!"));
2520 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval,
2524 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
2525 IEEE80211_ADDR_COPY(frm, bss->ni_bssid);
2526 frm += IEEE80211_ADDR_LEN;
2529 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
2530 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2531 frm = ieee80211_add_rsn(frm, vap);
2532 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2533 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) {
2534 frm = ieee80211_add_powercapability(frm,
2536 frm = ieee80211_add_supportedchannels(frm, ic);
2540 * Check the channel - we may be using an 11n NIC with an
2541 * 11n capable station, but we're configured to be an 11b
2544 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2545 IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
2546 ni->ni_ies.htcap_ie != NULL &&
2547 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) {
2548 frm = ieee80211_add_htcap(frm, ni);
2551 if ((vap->iv_flags_vht & IEEE80211_FVHT_VHT) &&
2552 IEEE80211_IS_CHAN_VHT(ni->ni_chan) &&
2553 ni->ni_ies.vhtcap_ie != NULL &&
2554 ni->ni_ies.vhtcap_ie[0] == IEEE80211_ELEMID_VHT_CAP) {
2555 frm = ieee80211_add_vhtcap(frm, ni);
2558 frm = ieee80211_add_wpa(frm, vap);
2559 if ((ic->ic_flags & IEEE80211_F_WME) &&
2560 ni->ni_ies.wme_ie != NULL)
2561 frm = ieee80211_add_wme_info(frm, &ic->ic_wme);
2564 * Same deal - only send HT info if we're on an 11n
2567 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2568 IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
2569 ni->ni_ies.htcap_ie != NULL &&
2570 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) {
2571 frm = ieee80211_add_htcap_vendor(frm, ni);
2573 #ifdef IEEE80211_SUPPORT_SUPERG
2574 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) {
2575 frm = ieee80211_add_ath(frm,
2576 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2577 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2578 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2579 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2581 #endif /* IEEE80211_SUPPORT_SUPERG */
2582 if (vap->iv_appie_assocreq != NULL)
2583 frm = add_appie(frm, vap->iv_appie_assocreq);
2584 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2586 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
2587 (void *) vap->iv_state);
2590 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2591 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2593 * asresp frame format
2594 * [2] capability information
2596 * [2] association ID
2597 * [tlv] supported rates
2598 * [tlv] extended supported rates
2599 * [tlv] HT capabilities (standard, if STA enabled)
2600 * [tlv] HT information (standard, if STA enabled)
2601 * [tlv] VHT capabilities (standard, if STA enabled)
2602 * [tlv] VHT information (standard, if STA enabled)
2603 * [tlv] WME (if configured and STA enabled)
2604 * [tlv] HT capabilities (vendor OUI, if STA enabled)
2605 * [tlv] HT information (vendor OUI, if STA enabled)
2606 * [tlv] Atheros capabilities (if STA enabled)
2607 * [tlv] AppIE's (optional)
2609 m = ieee80211_getmgtframe(&frm,
2610 ic->ic_headroom + sizeof(struct ieee80211_frame),
2614 + 2 + IEEE80211_RATE_SIZE
2615 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2616 + sizeof(struct ieee80211_ie_htcap) + 4
2617 + sizeof(struct ieee80211_ie_htinfo) + 4
2618 + sizeof(struct ieee80211_ie_vhtcap)
2619 + sizeof(struct ieee80211_ie_vht_operation)
2620 + sizeof(struct ieee80211_wme_param)
2621 #ifdef IEEE80211_SUPPORT_SUPERG
2622 + sizeof(struct ieee80211_ath_ie)
2624 + (vap->iv_appie_assocresp != NULL ?
2625 vap->iv_appie_assocresp->ie_len : 0)
2628 senderr(ENOMEM, is_tx_nobuf);
2630 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2631 *(uint16_t *)frm = htole16(capinfo);
2634 *(uint16_t *)frm = htole16(arg); /* status */
2637 if (arg == IEEE80211_STATUS_SUCCESS) {
2638 *(uint16_t *)frm = htole16(ni->ni_associd);
2639 IEEE80211_NODE_STAT(ni, tx_assoc);
2641 IEEE80211_NODE_STAT(ni, tx_assoc_fail);
2644 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2645 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2646 /* NB: respond according to what we received */
2647 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) {
2648 frm = ieee80211_add_htcap(frm, ni);
2649 frm = ieee80211_add_htinfo(frm, ni);
2651 if ((vap->iv_flags & IEEE80211_F_WME) &&
2652 ni->ni_ies.wme_ie != NULL)
2653 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2654 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) {
2655 frm = ieee80211_add_htcap_vendor(frm, ni);
2656 frm = ieee80211_add_htinfo_vendor(frm, ni);
2658 if (ni->ni_flags & IEEE80211_NODE_VHT) {
2659 frm = ieee80211_add_vhtcap(frm, ni);
2660 frm = ieee80211_add_vhtinfo(frm, ni);
2662 #ifdef IEEE80211_SUPPORT_SUPERG
2663 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS))
2664 frm = ieee80211_add_ath(frm,
2665 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2666 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2667 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2668 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2669 #endif /* IEEE80211_SUPPORT_SUPERG */
2670 if (vap->iv_appie_assocresp != NULL)
2671 frm = add_appie(frm, vap->iv_appie_assocresp);
2672 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2675 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2676 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2677 "send station disassociate (reason: %d (%s))", arg,
2678 ieee80211_reason_to_string(arg));
2679 m = ieee80211_getmgtframe(&frm,
2680 ic->ic_headroom + sizeof(struct ieee80211_frame),
2683 senderr(ENOMEM, is_tx_nobuf);
2684 *(uint16_t *)frm = htole16(arg); /* reason */
2685 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
2687 IEEE80211_NODE_STAT(ni, tx_disassoc);
2688 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg);
2692 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni,
2693 "invalid mgmt frame type %u", type);
2694 senderr(EINVAL, is_tx_unknownmgt);
2698 /* NB: force non-ProbeResp frames to the highest queue */
2699 params.ibp_pri = WME_AC_VO;
2700 params.ibp_rate0 = bss->ni_txparms->mgmtrate;
2701 /* NB: we know all frames are unicast */
2702 params.ibp_try0 = bss->ni_txparms->maxretry;
2703 params.ibp_power = bss->ni_txpower;
2704 return ieee80211_mgmt_output(ni, m, type, ¶ms);
2706 ieee80211_free_node(ni);
2713 * Return an mbuf with a probe response frame in it.
2714 * Space is left to prepend and 802.11 header at the
2715 * front but it's left to the caller to fill in.
2718 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy)
2720 struct ieee80211vap *vap = bss->ni_vap;
2721 struct ieee80211com *ic = bss->ni_ic;
2722 const struct ieee80211_rateset *rs;
2728 * probe response frame format
2730 * [2] beacon interval
2731 * [2] cabability information
2733 * [tlv] supported rates
2734 * [tlv] parameter set (FH/DS)
2735 * [tlv] parameter set (IBSS)
2736 * [tlv] country (optional)
2737 * [3] power control (optional)
2738 * [5] channel switch announcement (CSA) (optional)
2739 * [tlv] extended rate phy (ERP)
2740 * [tlv] extended supported rates
2741 * [tlv] RSN (optional)
2742 * [tlv] HT capabilities
2743 * [tlv] HT information
2744 * [tlv] VHT capabilities
2745 * [tlv] VHT information
2746 * [tlv] WPA (optional)
2747 * [tlv] WME (optional)
2748 * [tlv] Vendor OUI HT capabilities (optional)
2749 * [tlv] Vendor OUI HT information (optional)
2750 * [tlv] Atheros capabilities
2751 * [tlv] AppIE's (optional)
2752 * [tlv] Mesh ID (MBSS)
2753 * [tlv] Mesh Conf (MBSS)
2755 m = ieee80211_getmgtframe(&frm,
2756 ic->ic_headroom + sizeof(struct ieee80211_frame),
2760 + 2 + IEEE80211_NWID_LEN
2761 + 2 + IEEE80211_RATE_SIZE
2763 + IEEE80211_COUNTRY_MAX_SIZE
2765 + sizeof(struct ieee80211_csa_ie)
2766 + sizeof(struct ieee80211_quiet_ie)
2768 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2769 + sizeof(struct ieee80211_ie_wpa)
2770 + sizeof(struct ieee80211_ie_htcap)
2771 + sizeof(struct ieee80211_ie_htinfo)
2772 + sizeof(struct ieee80211_ie_wpa)
2773 + sizeof(struct ieee80211_wme_param)
2774 + 4 + sizeof(struct ieee80211_ie_htcap)
2775 + 4 + sizeof(struct ieee80211_ie_htinfo)
2776 + sizeof(struct ieee80211_ie_vhtcap)
2777 + sizeof(struct ieee80211_ie_vht_operation)
2778 #ifdef IEEE80211_SUPPORT_SUPERG
2779 + sizeof(struct ieee80211_ath_ie)
2781 #ifdef IEEE80211_SUPPORT_MESH
2782 + 2 + IEEE80211_MESHID_LEN
2783 + sizeof(struct ieee80211_meshconf_ie)
2785 + (vap->iv_appie_proberesp != NULL ?
2786 vap->iv_appie_proberesp->ie_len : 0)
2789 vap->iv_stats.is_tx_nobuf++;
2793 memset(frm, 0, 8); /* timestamp should be filled later */
2795 *(uint16_t *)frm = htole16(bss->ni_intval);
2797 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2798 *(uint16_t *)frm = htole16(capinfo);
2801 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen);
2802 rs = ieee80211_get_suprates(ic, bss->ni_chan);
2803 frm = ieee80211_add_rates(frm, rs);
2805 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) {
2806 *frm++ = IEEE80211_ELEMID_FHPARMS;
2808 *frm++ = bss->ni_fhdwell & 0x00ff;
2809 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff;
2810 *frm++ = IEEE80211_FH_CHANSET(
2811 ieee80211_chan2ieee(ic, bss->ni_chan));
2812 *frm++ = IEEE80211_FH_CHANPAT(
2813 ieee80211_chan2ieee(ic, bss->ni_chan));
2814 *frm++ = bss->ni_fhindex;
2816 *frm++ = IEEE80211_ELEMID_DSPARMS;
2818 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan);
2821 if (vap->iv_opmode == IEEE80211_M_IBSS) {
2822 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
2824 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
2826 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
2827 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
2828 frm = ieee80211_add_countryie(frm, ic);
2829 if (vap->iv_flags & IEEE80211_F_DOTH) {
2830 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan))
2831 frm = ieee80211_add_powerconstraint(frm, vap);
2832 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
2833 frm = ieee80211_add_csa(frm, vap);
2835 if (vap->iv_flags & IEEE80211_F_DOTH) {
2836 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
2837 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) {
2839 frm = ieee80211_add_quiet(frm, vap, 0);
2842 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan))
2843 frm = ieee80211_add_erp(frm, ic);
2844 frm = ieee80211_add_xrates(frm, rs);
2845 frm = ieee80211_add_rsn(frm, vap);
2847 * NB: legacy 11b clients do not get certain ie's.
2848 * The caller identifies such clients by passing
2849 * a token in legacy to us. Could expand this to be
2850 * any legacy client for stuff like HT ie's.
2852 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
2853 legacy != IEEE80211_SEND_LEGACY_11B) {
2854 frm = ieee80211_add_htcap(frm, bss);
2855 frm = ieee80211_add_htinfo(frm, bss);
2857 if (IEEE80211_IS_CHAN_VHT(bss->ni_chan) &&
2858 legacy != IEEE80211_SEND_LEGACY_11B) {
2859 frm = ieee80211_add_vhtcap(frm, bss);
2860 frm = ieee80211_add_vhtinfo(frm, bss);
2862 frm = ieee80211_add_wpa(frm, vap);
2863 if (vap->iv_flags & IEEE80211_F_WME)
2864 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2865 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
2866 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) &&
2867 legacy != IEEE80211_SEND_LEGACY_11B) {
2868 frm = ieee80211_add_htcap_vendor(frm, bss);
2869 frm = ieee80211_add_htinfo_vendor(frm, bss);
2871 #ifdef IEEE80211_SUPPORT_SUPERG
2872 if ((vap->iv_flags & IEEE80211_F_ATHEROS) &&
2873 legacy != IEEE80211_SEND_LEGACY_11B)
2874 frm = ieee80211_add_athcaps(frm, bss);
2876 if (vap->iv_appie_proberesp != NULL)
2877 frm = add_appie(frm, vap->iv_appie_proberesp);
2878 #ifdef IEEE80211_SUPPORT_MESH
2879 if (vap->iv_opmode == IEEE80211_M_MBSS) {
2880 frm = ieee80211_add_meshid(frm, vap);
2881 frm = ieee80211_add_meshconf(frm, vap);
2884 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2890 * Send a probe response frame to the specified mac address.
2891 * This does not go through the normal mgt frame api so we
2892 * can specify the destination address and re-use the bss node
2893 * for the sta reference.
2896 ieee80211_send_proberesp(struct ieee80211vap *vap,
2897 const uint8_t da[IEEE80211_ADDR_LEN], int legacy)
2899 struct ieee80211_node *bss = vap->iv_bss;
2900 struct ieee80211com *ic = vap->iv_ic;
2904 if (vap->iv_state == IEEE80211_S_CAC) {
2905 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss,
2906 "block %s frame in CAC state", "probe response");
2907 vap->iv_stats.is_tx_badstate++;
2908 return EIO; /* XXX */
2912 * Hold a reference on the node so it doesn't go away until after
2913 * the xmit is complete all the way in the driver. On error we
2914 * will remove our reference.
2916 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2917 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
2918 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr),
2919 ieee80211_node_refcnt(bss)+1);
2920 ieee80211_ref_node(bss);
2922 m = ieee80211_alloc_proberesp(bss, legacy);
2924 ieee80211_free_node(bss);
2928 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2929 KASSERT(m != NULL, ("no room for header"));
2931 IEEE80211_TX_LOCK(ic);
2932 ieee80211_send_setup(bss, m,
2933 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP,
2934 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid);
2935 /* XXX power management? */
2936 m->m_flags |= M_ENCAP; /* mark encapsulated */
2938 M_WME_SETAC(m, WME_AC_BE);
2940 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
2941 "send probe resp on channel %u to %s%s\n",
2942 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da),
2943 legacy ? " <legacy>" : "");
2944 IEEE80211_NODE_STAT(bss, tx_mgmt);
2946 ret = ieee80211_raw_output(vap, bss, m, NULL);
2947 IEEE80211_TX_UNLOCK(ic);
2952 * Allocate and build a RTS (Request To Send) control frame.
2955 ieee80211_alloc_rts(struct ieee80211com *ic,
2956 const uint8_t ra[IEEE80211_ADDR_LEN],
2957 const uint8_t ta[IEEE80211_ADDR_LEN],
2960 struct ieee80211_frame_rts *rts;
2963 /* XXX honor ic_headroom */
2964 m = m_gethdr(M_NOWAIT, MT_DATA);
2966 rts = mtod(m, struct ieee80211_frame_rts *);
2967 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2968 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS;
2969 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2970 *(u_int16_t *)rts->i_dur = htole16(dur);
2971 IEEE80211_ADDR_COPY(rts->i_ra, ra);
2972 IEEE80211_ADDR_COPY(rts->i_ta, ta);
2974 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts);
2980 * Allocate and build a CTS (Clear To Send) control frame.
2983 ieee80211_alloc_cts(struct ieee80211com *ic,
2984 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur)
2986 struct ieee80211_frame_cts *cts;
2989 /* XXX honor ic_headroom */
2990 m = m_gethdr(M_NOWAIT, MT_DATA);
2992 cts = mtod(m, struct ieee80211_frame_cts *);
2993 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2994 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS;
2995 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2996 *(u_int16_t *)cts->i_dur = htole16(dur);
2997 IEEE80211_ADDR_COPY(cts->i_ra, ra);
2999 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts);
3005 ieee80211_tx_mgt_timeout(void *arg)
3007 struct ieee80211vap *vap = arg;
3009 IEEE80211_LOCK(vap->iv_ic);
3010 if (vap->iv_state != IEEE80211_S_INIT &&
3011 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) {
3013 * NB: it's safe to specify a timeout as the reason here;
3014 * it'll only be used in the right state.
3016 ieee80211_new_state_locked(vap, IEEE80211_S_SCAN,
3017 IEEE80211_SCAN_FAIL_TIMEOUT);
3019 IEEE80211_UNLOCK(vap->iv_ic);
3023 * This is the callback set on net80211-sourced transmitted
3024 * authentication request frames.
3026 * This does a couple of things:
3028 * + If the frame transmitted was a success, it schedules a future
3029 * event which will transition the interface to scan.
3030 * If a state transition _then_ occurs before that event occurs,
3031 * said state transition will cancel this callout.
3033 * + If the frame transmit was a failure, it immediately schedules
3034 * the transition back to scan.
3037 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status)
3039 struct ieee80211vap *vap = ni->ni_vap;
3040 enum ieee80211_state ostate = (enum ieee80211_state) arg;
3043 * Frame transmit completed; arrange timer callback. If
3044 * transmit was successfully we wait for response. Otherwise
3045 * we arrange an immediate callback instead of doing the
3046 * callback directly since we don't know what state the driver
3047 * is in (e.g. what locks it is holding). This work should
3048 * not be too time-critical and not happen too often so the
3049 * added overhead is acceptable.
3051 * XXX what happens if !acked but response shows up before callback?
3053 if (vap->iv_state == ostate) {
3054 callout_reset(&vap->iv_mgtsend,
3055 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0,
3056 ieee80211_tx_mgt_timeout, vap);
3061 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm,
3062 struct ieee80211_node *ni)
3064 struct ieee80211vap *vap = ni->ni_vap;
3065 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
3066 struct ieee80211com *ic = ni->ni_ic;
3067 struct ieee80211_rateset *rs = &ni->ni_rates;
3071 * beacon frame format
3073 * TODO: update to 802.11-2012; a lot of stuff has changed;
3074 * vendor extensions should be at the end, etc.
3077 * [2] beacon interval
3078 * [2] cabability information
3080 * [tlv] supported rates
3081 * [3] parameter set (DS)
3082 * [8] CF parameter set (optional)
3083 * [tlv] parameter set (IBSS/TIM)
3084 * [tlv] country (optional)
3085 * [3] power control (optional)
3086 * [5] channel switch announcement (CSA) (optional)
3088 * XXX TODO: IBSS DFS
3089 * XXX TODO: TPC report
3090 * [tlv] extended rate phy (ERP)
3091 * [tlv] extended supported rates
3092 * [tlv] RSN parameters
3094 * (XXX EDCA parameter set, QoS capability?)
3095 * XXX TODO: AP channel report
3097 * [tlv] HT capabilities
3098 * [tlv] HT information
3099 * XXX TODO: 20/40 BSS coexistence
3102 * XXX TODO: mesh config
3103 * XXX TODO: mesh awake window
3104 * XXX TODO: beacon timing (mesh, etc)
3105 * XXX TODO: MCCAOP Advertisement Overview
3106 * XXX TODO: MCCAOP Advertisement
3107 * XXX TODO: Mesh channel switch parameters
3109 * XXX TODO: VHT capabilities
3110 * XXX TODO: VHT operation
3111 * XXX TODO: VHT transmit power envelope
3112 * XXX TODO: channel switch wrapper element
3113 * XXX TODO: extended BSS load element
3115 * XXX Vendor-specific OIDs (e.g. Atheros)
3116 * [tlv] WPA parameters
3117 * [tlv] WME parameters
3118 * [tlv] Vendor OUI HT capabilities (optional)
3119 * [tlv] Vendor OUI HT information (optional)
3120 * [tlv] Atheros capabilities (optional)
3121 * [tlv] TDMA parameters (optional)
3122 * [tlv] Mesh ID (MBSS)
3123 * [tlv] Mesh Conf (MBSS)
3124 * [tlv] application data (optional)
3127 memset(bo, 0, sizeof(*bo));
3129 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */
3131 *(uint16_t *)frm = htole16(ni->ni_intval);
3133 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
3134 bo->bo_caps = (uint16_t *)frm;
3135 *(uint16_t *)frm = htole16(capinfo);
3137 *frm++ = IEEE80211_ELEMID_SSID;
3138 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) {
3139 *frm++ = ni->ni_esslen;
3140 memcpy(frm, ni->ni_essid, ni->ni_esslen);
3141 frm += ni->ni_esslen;
3144 frm = ieee80211_add_rates(frm, rs);
3145 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) {
3146 *frm++ = IEEE80211_ELEMID_DSPARMS;
3148 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
3150 if (ic->ic_flags & IEEE80211_F_PCF) {
3152 frm = ieee80211_add_cfparms(frm, ic);
3155 if (vap->iv_opmode == IEEE80211_M_IBSS) {
3156 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
3158 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
3160 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
3161 vap->iv_opmode == IEEE80211_M_MBSS) {
3162 /* TIM IE is the same for Mesh and Hostap */
3163 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;
3165 tie->tim_ie = IEEE80211_ELEMID_TIM;
3166 tie->tim_len = 4; /* length */
3167 tie->tim_count = 0; /* DTIM count */
3168 tie->tim_period = vap->iv_dtim_period; /* DTIM period */
3169 tie->tim_bitctl = 0; /* bitmap control */
3170 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */
3171 frm += sizeof(struct ieee80211_tim_ie);
3174 bo->bo_tim_trailer = frm;
3175 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
3176 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
3177 frm = ieee80211_add_countryie(frm, ic);
3178 if (vap->iv_flags & IEEE80211_F_DOTH) {
3179 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
3180 frm = ieee80211_add_powerconstraint(frm, vap);
3182 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
3183 frm = ieee80211_add_csa(frm, vap);
3187 bo->bo_quiet = NULL;
3188 if (vap->iv_flags & IEEE80211_F_DOTH) {
3189 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
3190 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
3191 (vap->iv_quiet == 1)) {
3193 * We only insert the quiet IE offset if
3194 * the quiet IE is enabled. Otherwise don't
3195 * put it here or we'll just overwrite
3196 * some other beacon contents.
3198 if (vap->iv_quiet) {
3200 frm = ieee80211_add_quiet(frm,vap, 0);
3205 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) {
3207 frm = ieee80211_add_erp(frm, ic);
3209 frm = ieee80211_add_xrates(frm, rs);
3210 frm = ieee80211_add_rsn(frm, vap);
3211 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
3212 frm = ieee80211_add_htcap(frm, ni);
3213 bo->bo_htinfo = frm;
3214 frm = ieee80211_add_htinfo(frm, ni);
3217 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) {
3218 frm = ieee80211_add_vhtcap(frm, ni);
3219 bo->bo_vhtinfo = frm;
3220 frm = ieee80211_add_vhtinfo(frm, ni);
3221 /* Transmit power envelope */
3222 /* Channel switch wrapper element */
3223 /* Extended bss load element */
3226 frm = ieee80211_add_wpa(frm, vap);
3227 if (vap->iv_flags & IEEE80211_F_WME) {
3229 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
3231 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
3232 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) {
3233 frm = ieee80211_add_htcap_vendor(frm, ni);
3234 frm = ieee80211_add_htinfo_vendor(frm, ni);
3237 #ifdef IEEE80211_SUPPORT_SUPERG
3238 if (vap->iv_flags & IEEE80211_F_ATHEROS) {
3240 frm = ieee80211_add_athcaps(frm, ni);
3243 #ifdef IEEE80211_SUPPORT_TDMA
3244 if (vap->iv_caps & IEEE80211_C_TDMA) {
3246 frm = ieee80211_add_tdma(frm, vap);
3249 if (vap->iv_appie_beacon != NULL) {
3251 bo->bo_appie_len = vap->iv_appie_beacon->ie_len;
3252 frm = add_appie(frm, vap->iv_appie_beacon);
3255 /* XXX TODO: move meshid/meshconf up to before vendor extensions? */
3256 #ifdef IEEE80211_SUPPORT_MESH
3257 if (vap->iv_opmode == IEEE80211_M_MBSS) {
3258 frm = ieee80211_add_meshid(frm, vap);
3259 bo->bo_meshconf = frm;
3260 frm = ieee80211_add_meshconf(frm, vap);
3263 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer;
3264 bo->bo_csa_trailer_len = frm - bo->bo_csa;
3265 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3269 * Allocate a beacon frame and fillin the appropriate bits.
3272 ieee80211_beacon_alloc(struct ieee80211_node *ni)
3274 struct ieee80211vap *vap = ni->ni_vap;
3275 struct ieee80211com *ic = ni->ni_ic;
3276 struct ifnet *ifp = vap->iv_ifp;
3277 struct ieee80211_frame *wh;
3283 * Update the "We're putting the quiet IE in the beacon" state.
3285 if (vap->iv_quiet == 1)
3286 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE;
3287 else if (vap->iv_quiet == 0)
3288 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE;
3291 * beacon frame format
3293 * Note: This needs updating for 802.11-2012.
3296 * [2] beacon interval
3297 * [2] cabability information
3299 * [tlv] supported rates
3300 * [3] parameter set (DS)
3301 * [8] CF parameter set (optional)
3302 * [tlv] parameter set (IBSS/TIM)
3303 * [tlv] country (optional)
3304 * [3] power control (optional)
3305 * [5] channel switch announcement (CSA) (optional)
3306 * [tlv] extended rate phy (ERP)
3307 * [tlv] extended supported rates
3308 * [tlv] RSN parameters
3309 * [tlv] HT capabilities
3310 * [tlv] HT information
3311 * [tlv] VHT capabilities
3312 * [tlv] VHT operation
3313 * [tlv] Vendor OUI HT capabilities (optional)
3314 * [tlv] Vendor OUI HT information (optional)
3315 * XXX Vendor-specific OIDs (e.g. Atheros)
3316 * [tlv] WPA parameters
3317 * [tlv] WME parameters
3318 * [tlv] TDMA parameters (optional)
3319 * [tlv] Mesh ID (MBSS)
3320 * [tlv] Mesh Conf (MBSS)
3321 * [tlv] application data (optional)
3322 * NB: we allocate the max space required for the TIM bitmap.
3323 * XXX how big is this?
3325 pktlen = 8 /* time stamp */
3326 + sizeof(uint16_t) /* beacon interval */
3327 + sizeof(uint16_t) /* capabilities */
3328 + 2 + ni->ni_esslen /* ssid */
3329 + 2 + IEEE80211_RATE_SIZE /* supported rates */
3330 + 2 + 1 /* DS parameters */
3331 + 2 + 6 /* CF parameters */
3332 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */
3333 + IEEE80211_COUNTRY_MAX_SIZE /* country */
3334 + 2 + 1 /* power control */
3335 + sizeof(struct ieee80211_csa_ie) /* CSA */
3336 + sizeof(struct ieee80211_quiet_ie) /* Quiet */
3338 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
3339 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
3340 2*sizeof(struct ieee80211_ie_wpa) : 0)
3341 /* XXX conditional? */
3342 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */
3343 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */
3344 + sizeof(struct ieee80211_ie_vhtcap)/* VHT caps */
3345 + sizeof(struct ieee80211_ie_vht_operation)/* VHT info */
3346 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */
3347 sizeof(struct ieee80211_wme_param) : 0)
3348 #ifdef IEEE80211_SUPPORT_SUPERG
3349 + sizeof(struct ieee80211_ath_ie) /* ATH */
3351 #ifdef IEEE80211_SUPPORT_TDMA
3352 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */
3353 sizeof(struct ieee80211_tdma_param) : 0)
3355 #ifdef IEEE80211_SUPPORT_MESH
3356 + 2 + ni->ni_meshidlen
3357 + sizeof(struct ieee80211_meshconf_ie)
3359 + IEEE80211_MAX_APPIE
3361 m = ieee80211_getmgtframe(&frm,
3362 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen);
3364 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
3365 "%s: cannot get buf; size %u\n", __func__, pktlen);
3366 vap->iv_stats.is_tx_nobuf++;
3369 ieee80211_beacon_construct(m, frm, ni);
3371 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
3372 KASSERT(m != NULL, ("no space for 802.11 header?"));
3373 wh = mtod(m, struct ieee80211_frame *);
3374 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
3375 IEEE80211_FC0_SUBTYPE_BEACON;
3376 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
3377 *(uint16_t *)wh->i_dur = 0;
3378 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
3379 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
3380 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
3381 *(uint16_t *)wh->i_seq = 0;
3387 * Update the dynamic parts of a beacon frame based on the current state.
3390 ieee80211_beacon_update(struct ieee80211_node *ni, struct mbuf *m, int mcast)
3392 struct ieee80211vap *vap = ni->ni_vap;
3393 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
3394 struct ieee80211com *ic = ni->ni_ic;
3395 int len_changed = 0;
3397 struct ieee80211_frame *wh;
3398 ieee80211_seq seqno;
3402 * Handle 11h channel change when we've reached the count.
3403 * We must recalculate the beacon frame contents to account
3404 * for the new channel. Note we do this only for the first
3405 * vap that reaches this point; subsequent vaps just update
3406 * their beacon state to reflect the recalculated channel.
3408 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) &&
3409 vap->iv_csa_count == ic->ic_csa_count) {
3410 vap->iv_csa_count = 0;
3412 * Effect channel change before reconstructing the beacon
3413 * frame contents as many places reference ni_chan.
3415 if (ic->ic_csa_newchan != NULL)
3416 ieee80211_csa_completeswitch(ic);
3418 * NB: ieee80211_beacon_construct clears all pending
3419 * updates in bo_flags so we don't need to explicitly
3420 * clear IEEE80211_BEACON_CSA.
3422 ieee80211_beacon_construct(m,
3423 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3425 /* XXX do WME aggressive mode processing? */
3426 IEEE80211_UNLOCK(ic);
3427 return 1; /* just assume length changed */
3431 * Handle the quiet time element being added and removed.
3432 * Again, for now we just cheat and reconstruct the whole
3433 * beacon - that way the gap is provided as appropriate.
3435 * So, track whether we have already added the IE versus
3436 * whether we want to be adding the IE.
3438 if ((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) &&
3439 (vap->iv_quiet == 0)) {
3441 * Quiet time beacon IE enabled, but it's disabled;
3444 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE;
3445 ieee80211_beacon_construct(m,
3446 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3447 /* XXX do WME aggressive mode processing? */
3448 IEEE80211_UNLOCK(ic);
3449 return 1; /* just assume length changed */
3452 if (((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) == 0) &&
3453 (vap->iv_quiet == 1)) {
3455 * Quiet time beacon IE disabled, but it's now enabled;
3458 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE;
3459 ieee80211_beacon_construct(m,
3460 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3461 /* XXX do WME aggressive mode processing? */
3462 IEEE80211_UNLOCK(ic);
3463 return 1; /* just assume length changed */
3466 wh = mtod(m, struct ieee80211_frame *);
3469 * XXX TODO Strictly speaking this should be incremented with the TX
3470 * lock held so as to serialise access to the non-qos TID sequence
3473 * If the driver identifies it does its own TX seqno management then
3474 * we can skip this (and still not do the TX seqno.)
3476 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
3477 *(uint16_t *)&wh->i_seq[0] =
3478 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
3479 M_SEQNO_SET(m, seqno);
3481 /* XXX faster to recalculate entirely or just changes? */
3482 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
3483 *bo->bo_caps = htole16(capinfo);
3485 if (vap->iv_flags & IEEE80211_F_WME) {
3486 struct ieee80211_wme_state *wme = &ic->ic_wme;
3489 * Check for aggressive mode change. When there is
3490 * significant high priority traffic in the BSS
3491 * throttle back BE traffic by using conservative
3492 * parameters. Otherwise BE uses aggressive params
3493 * to optimize performance of legacy/non-QoS traffic.
3495 if (wme->wme_flags & WME_F_AGGRMODE) {
3496 if (wme->wme_hipri_traffic >
3497 wme->wme_hipri_switch_thresh) {
3498 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
3499 "%s: traffic %u, disable aggressive mode\n",
3500 __func__, wme->wme_hipri_traffic);
3501 wme->wme_flags &= ~WME_F_AGGRMODE;
3502 ieee80211_wme_updateparams_locked(vap);
3503 wme->wme_hipri_traffic =
3504 wme->wme_hipri_switch_hysteresis;
3506 wme->wme_hipri_traffic = 0;
3508 if (wme->wme_hipri_traffic <=
3509 wme->wme_hipri_switch_thresh) {
3510 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
3511 "%s: traffic %u, enable aggressive mode\n",
3512 __func__, wme->wme_hipri_traffic);
3513 wme->wme_flags |= WME_F_AGGRMODE;
3514 ieee80211_wme_updateparams_locked(vap);
3515 wme->wme_hipri_traffic = 0;
3517 wme->wme_hipri_traffic =
3518 wme->wme_hipri_switch_hysteresis;
3520 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) {
3521 (void) ieee80211_add_wme_param(bo->bo_wme, wme);
3522 clrbit(bo->bo_flags, IEEE80211_BEACON_WME);
3526 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) {
3527 ieee80211_ht_update_beacon(vap, bo);
3528 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO);
3530 #ifdef IEEE80211_SUPPORT_TDMA
3531 if (vap->iv_caps & IEEE80211_C_TDMA) {
3533 * NB: the beacon is potentially updated every TBTT.
3535 ieee80211_tdma_update_beacon(vap, bo);
3538 #ifdef IEEE80211_SUPPORT_MESH
3539 if (vap->iv_opmode == IEEE80211_M_MBSS)
3540 ieee80211_mesh_update_beacon(vap, bo);
3543 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
3544 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/
3545 struct ieee80211_tim_ie *tie =
3546 (struct ieee80211_tim_ie *) bo->bo_tim;
3547 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) {
3548 u_int timlen, timoff, i;
3550 * ATIM/DTIM needs updating. If it fits in the
3551 * current space allocated then just copy in the
3552 * new bits. Otherwise we need to move any trailing
3553 * data to make room. Note that we know there is
3554 * contiguous space because ieee80211_beacon_allocate
3555 * insures there is space in the mbuf to write a
3556 * maximal-size virtual bitmap (based on iv_max_aid).
3559 * Calculate the bitmap size and offset, copy any
3560 * trailer out of the way, and then copy in the
3561 * new bitmap and update the information element.
3562 * Note that the tim bitmap must contain at least
3563 * one byte and any offset must be even.
3565 if (vap->iv_ps_pending != 0) {
3566 timoff = 128; /* impossibly large */
3567 for (i = 0; i < vap->iv_tim_len; i++)
3568 if (vap->iv_tim_bitmap[i]) {
3572 KASSERT(timoff != 128, ("tim bitmap empty!"));
3573 for (i = vap->iv_tim_len-1; i >= timoff; i--)
3574 if (vap->iv_tim_bitmap[i])
3576 timlen = 1 + (i - timoff);
3583 * TODO: validate this!
3585 if (timlen != bo->bo_tim_len) {
3586 /* copy up/down trailer */
3587 int adjust = tie->tim_bitmap+timlen
3588 - bo->bo_tim_trailer;
3589 ovbcopy(bo->bo_tim_trailer,
3590 bo->bo_tim_trailer+adjust,
3591 bo->bo_tim_trailer_len);
3592 bo->bo_tim_trailer += adjust;
3593 bo->bo_erp += adjust;
3594 bo->bo_htinfo += adjust;
3595 bo->bo_vhtinfo += adjust;
3596 #ifdef IEEE80211_SUPPORT_SUPERG
3597 bo->bo_ath += adjust;
3599 #ifdef IEEE80211_SUPPORT_TDMA
3600 bo->bo_tdma += adjust;
3602 #ifdef IEEE80211_SUPPORT_MESH
3603 bo->bo_meshconf += adjust;
3605 bo->bo_appie += adjust;
3606 bo->bo_wme += adjust;
3607 bo->bo_csa += adjust;
3608 bo->bo_quiet += adjust;
3609 bo->bo_tim_len = timlen;
3611 /* update information element */
3612 tie->tim_len = 3 + timlen;
3613 tie->tim_bitctl = timoff;
3616 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff,
3619 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM);
3621 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
3622 "%s: TIM updated, pending %u, off %u, len %u\n",
3623 __func__, vap->iv_ps_pending, timoff, timlen);
3625 /* count down DTIM period */
3626 if (tie->tim_count == 0)
3627 tie->tim_count = tie->tim_period - 1;
3630 /* update state for buffered multicast frames on DTIM */
3631 if (mcast && tie->tim_count == 0)
3632 tie->tim_bitctl |= 1;
3634 tie->tim_bitctl &= ~1;
3635 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) {
3636 struct ieee80211_csa_ie *csa =
3637 (struct ieee80211_csa_ie *) bo->bo_csa;
3640 * Insert or update CSA ie. If we're just starting
3641 * to count down to the channel switch then we need
3642 * to insert the CSA ie. Otherwise we just need to
3643 * drop the count. The actual change happens above
3644 * when the vap's count reaches the target count.
3646 if (vap->iv_csa_count == 0) {
3647 memmove(&csa[1], csa, bo->bo_csa_trailer_len);
3648 bo->bo_erp += sizeof(*csa);
3649 bo->bo_htinfo += sizeof(*csa);
3650 bo->bo_vhtinfo += sizeof(*csa);
3651 bo->bo_wme += sizeof(*csa);
3652 #ifdef IEEE80211_SUPPORT_SUPERG
3653 bo->bo_ath += sizeof(*csa);
3655 #ifdef IEEE80211_SUPPORT_TDMA
3656 bo->bo_tdma += sizeof(*csa);
3658 #ifdef IEEE80211_SUPPORT_MESH
3659 bo->bo_meshconf += sizeof(*csa);
3661 bo->bo_appie += sizeof(*csa);
3662 bo->bo_csa_trailer_len += sizeof(*csa);
3663 bo->bo_quiet += sizeof(*csa);
3664 bo->bo_tim_trailer_len += sizeof(*csa);
3665 m->m_len += sizeof(*csa);
3666 m->m_pkthdr.len += sizeof(*csa);
3668 ieee80211_add_csa(bo->bo_csa, vap);
3671 vap->iv_csa_count++;
3672 /* NB: don't clear IEEE80211_BEACON_CSA */
3676 * Only add the quiet time IE if we've enabled it
3679 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
3680 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) {
3681 if (vap->iv_quiet &&
3682 (vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE)) {
3683 ieee80211_add_quiet(bo->bo_quiet, vap, 1);
3686 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) {
3688 * ERP element needs updating.
3690 (void) ieee80211_add_erp(bo->bo_erp, ic);
3691 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP);
3693 #ifdef IEEE80211_SUPPORT_SUPERG
3694 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) {
3695 ieee80211_add_athcaps(bo->bo_ath, ni);
3696 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH);
3700 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) {
3701 const struct ieee80211_appie *aie = vap->iv_appie_beacon;
3707 aielen += aie->ie_len;
3708 if (aielen != bo->bo_appie_len) {
3709 /* copy up/down trailer */
3710 int adjust = aielen - bo->bo_appie_len;
3711 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust,
3712 bo->bo_tim_trailer_len);
3713 bo->bo_tim_trailer += adjust;
3714 bo->bo_appie += adjust;
3715 bo->bo_appie_len = aielen;
3721 frm = add_appie(frm, aie);
3722 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE);
3724 IEEE80211_UNLOCK(ic);
3730 * Do Ethernet-LLC encapsulation for each payload in a fast frame
3731 * tunnel encapsulation. The frame is assumed to have an Ethernet
3732 * header at the front that must be stripped before prepending the
3733 * LLC followed by the Ethernet header passed in (with an Ethernet
3734 * type that specifies the payload size).
3737 ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
3738 const struct ether_header *eh)
3743 /* XXX optimize by combining m_adj+M_PREPEND */
3744 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
3745 llc = mtod(m, struct llc *);
3746 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
3747 llc->llc_control = LLC_UI;
3748 llc->llc_snap.org_code[0] = 0;
3749 llc->llc_snap.org_code[1] = 0;
3750 llc->llc_snap.org_code[2] = 0;
3751 llc->llc_snap.ether_type = eh->ether_type;
3752 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
3754 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT);
3755 if (m == NULL) { /* XXX cannot happen */
3756 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
3757 "%s: no space for ether_header\n", __func__);
3758 vap->iv_stats.is_tx_nobuf++;
3761 ETHER_HEADER_COPY(mtod(m, void *), eh);
3762 mtod(m, struct ether_header *)->ether_type = htons(payload);
3767 * Complete an mbuf transmission.
3769 * For now, this simply processes a completed frame after the
3770 * driver has completed it's transmission and/or retransmission.
3771 * It assumes the frame is an 802.11 encapsulated frame.
3773 * Later on it will grow to become the exit path for a given frame
3774 * from the driver and, depending upon how it's been encapsulated
3775 * and already transmitted, it may end up doing A-MPDU retransmission,
3776 * power save requeuing, etc.
3778 * In order for the above to work, the driver entry point to this
3779 * must not hold any driver locks. Thus, the driver needs to delay
3780 * any actual mbuf completion until it can release said locks.
3782 * This frees the mbuf and if the mbuf has a node reference,
3783 * the node reference will be freed.
3786 ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status)
3790 struct ifnet *ifp = ni->ni_vap->iv_ifp;
3793 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
3794 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
3795 if (m->m_flags & M_MCAST)
3796 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
3798 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
3799 if (m->m_flags & M_TXCB)
3800 ieee80211_process_callback(ni, m, status);
3801 ieee80211_free_node(ni);